THE PANECOIDEAE OF MECHIGAN Thesis far The Degree of M. 5.. MICHIGAN STATE COLLEGE Themas Henry Pai‘cn Marshall 1952 3 L293 10'627 0'675 : . . -~ .T- ,__,,._._T.__* -._-___._... ‘ . I '_ __ ll 4-. - -m . _‘ I l 3' € : q { This is to certify that the I i .3” ' i .. thesis entitled :3. .g: . 'a The Panicoideae of Michigan ' . ' I), . . I; presented by | Thomas Henry Paton Marshall i‘ l ;: i” g - i L. has been accepted towards fulfillment , g‘ of the requirements for I; '7 i: l' l“ ‘ ___Kn_S_-_degree mm rJ- ' L ; M :f ' * e. 4 - Major professor s; ‘1 Date—EasLZZ._195.2._ ‘.‘ “vi, "QT. .g.‘ ‘ >_. ‘ r"-‘ “" an“ 203 A ‘7 -‘: 71.“? ‘5‘}: MSU LIBRARIES "n RETURNING MATERIALS: Place in book drop to remove this checkout from your record. FINES will be charged if book is returned after the date stamped beiow. Moa'ew - *w‘ .l “T‘M- THE PANICOIDEAE OF MICHIGAN By Thomas Henry Paton Egrehall AN ABSTRACT Submitted to the School of Graduate Studies of Michigan State College of Agriculture and Applied Science in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Department of Botany and Plant Path010gy Year 1952 Thomas Henry Paton Marshall The purpose of this report is to present a modern flo- ristic treatment of the subfamily Panicoideae (Gramineae) as it occurs in Michigan. The genera considered are Setaria, Cenchrus, Echinochloa, Digitaria, Leptoloma, Paspalum, Panicum, Andropogon, Sorghum, Sorghastrum and Tripsacum. The genera Pennisetum and Ega_are also included because, al- though they are not a persistent part of the state flora, they may be encountered occasionally as escapes from culti- 'vation. Specimens from the herbaria of Michigan State College, Cranbrook Institute of Science, Division of Botany and Plant Path010gy of the Canadian Department of Agriculture, Houghton Lake Wildlife Experiment Station, Michigan State Normal Col- lege, University of Michigan, University of Notre Dame and Western Michigan College were examined. The 'Manual of the Grasses of the United States", edition 2, by A. S. Hitchcock and A. Chase (1951) was used as a basis for identification of specimens. Other manuals and papers were consulted for additional information. Approximately 1900 specimens, representing 11 genera and 63 species were examined. All available publications on the flora of Michigan, beginning with J. Wright's catalogue (1839), were searched for references to the Panicoideae in the state. The only important state-wide publication on the Michigan flora is Thomas Henry Paton Marshall 2 that of W. J. Beal (1904), in which numerous members of the ' Panicoideae are listed. Keys to the tribes, genera and species of Michigan Pani- coideae are included in this report. They are designed especially for the Michigan taxa and were adapted from the keys in the Manual by Hitchcock and Chase. Each species is individuallyvtreated. Following the currently accepted bi- nomial is a list of synonyms, a brief note on habitat and data on collections and unconfirmed reports. A distribution map is included for each species at the end of the report. The Michigan Panicoideae may be divided into six groups based on distribution. These groups are: species of state- wide distribution; species of the southern half of the lower peninsula with scattered distribution in the upper peninsula; species of the entire lower peninsula; species of the southern half of the lower peninsula; species of restricted distribu- tion or of rare occurrence; introduced weeds or waifs. A cumulative map showing the number of species per county is also included in the report. REFERENCES Beal, I. J. 1904. Michigan flora, a list of the fern and seed plants growing without cultivation. Mich. Acad. 801. Rep. 5: 1—-l47. Hitchcock, A. S. and Chase, A. 1951. Manual of the grasses of the United States. U. S. D. A. Misc. Publ. 300. ed. 3. 1051 pp. Thomas Henry Paton Marshall 3 lright, J. 1839. Cata10gue of the phaenogamous and filiooid plants collected on the eolOgical survey of Michigan. Legislative Rep. 23: l --44. THE PANICOIDEAE OF MICHIGAN By Thomas Henry Paton Marshall A THESIS Submitted to the School of Graduate Studies of Michigan State College of Agriculture and Applied Science in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Department of Botany and Plant Pathology 1952 11 TABLE OF CONTENTS ACWOWIAEDGEMENTS 00000000000000...00.000000000009000... INTRODUCTION .... ....... . ........................... .. HISTORICAL BACKGROUND .. ............................. . MATERIALS AND PROCEDURES ........... ..... . ........... . COMMENTS ON HABITATS AND DISTRIBUTION .. ........... ... Habitats .. ......... . ...... ...... ........ ........ Distribution ............. ...................... . Distributional Patterns in Michigan . ............ TAXONOMIC TREATMENT ...,.... ....................... ... Nomenclatural Considerations .................... Doubtfully and Erroneously Reported Species ..... Numerical Summary of Genera and Species .. ..... .. Explanation of Abbreviations . ....... . ......... .. Abbreviations of herbaria .. ...... . ....... .. Abbreviations of collectors .. ............. . KEY TO THE TRIBES OF THE PANICOIDEAE .......... ....... TRIBE PANICEAE ......... ............ . ................ . Key to the Michigan Genera ..... ................. Genus l. Setazia .... ....................... Genus 2. Pennisetum . ....................... Genus 3. Genghggs .... ..................... . Genus 4. Echincghloa ...... ................. 61““;(‘MI‘ H fi‘c'r’j' I.) iv $.03 «I ‘1 01 N H 13 13 15 16 18 19 19 23 34 34 34 30 30 iii Genus 5. Digitaria ......................... 37 Genus 6. Leptoloma . ........................ 4O Genus 7. Paspalum .................. ........ 41 Genus 8. Panicum . .......................... 43 TRIBE ANDROPOGONEAE . ..... . .................. . ........ 82 Key to the Michigan Genera . ..................... 82 Genus 9. Andropogon . ..... . ...... . .......... 82 Genus 10. Sorghum .. ..... .............. ..... 87 Genus ll. Sorghastrum . ..................... 88 TRIBE TRIPSACEAE ......... ..... . ...................... 90 Key to the Michigan Genera ................ ..... . 9O Genus 12. Tgipsaggm . ............ . .......... 90 Genus 13. _Z_e_a .. .................. .. ...... 91 SUMMARY ... .................. ... ..................... . 92 BIBLIOGRAPHY ................. ..... . ...... . ......... .. 94 APPENDIX: DISTRIBUTION MAPS ....... .................. 102 Summary of Distribution by Counties (Map l) ..... 104 Individual Species Distributions (Maps 2—-64) ... 106 iv ACKNOWLEDGEMENTS The author wishes to express his thanks to Dr. Charles ' L. Gilly, under whose direction this study was undertaken. In recognition of his unfailing interest and generous assis- tance these results are hereby dedicated to him. He is also greatly indebted to Dr. William B. Drew for his counsel and guidance in Dr. Gilly's absence during part of the period of study, and for securing the loans of her- barium material from the various herbaria. He also wishes to thank Dr. Rogers McVaugh of the University of Michigan for his hospitality and encouragement while studying the materials at the University of Michigan Herbarium. ' He wishes to thank all the curators who made available for study the collections of Michigan Panicoideae from their several herbaria. Thanks are also due to Mr. Philip G. Coleman for his help in making the photographic reproductions of the maps, to Mr. M. L. Guenther for assistance with one of the maps, and to Drs. G. B. Wilson, H. T. Darlington, L. H. Harvey, and others for their helpful suggestions and assistance of various kinds. INTRODUCTION The subfamily Panicoideae is the smaller of the two subfamilies in the family Gramineae. It consists of the three tribes, Paniceae, AndrOpogoneae, and Tripsaceae. The Paniceae comprise the most primitive of these three taxa and, according to Bews (1929), are probably derived from the Bambuseae. They are, in the main, tropical or subtropical grasses which are found in habitats ranging from marshes to fairly dry sandy locations. The AndrOpcgoneae, derived from the Paniceae and.having more advanced characteristics, form another group which is primarily trOpical and subtrOpical. They reach their greatest floristic importance in the drier savannas of those regions and extend into similar habitats in the Northern Hemisphere. The third tribe, the Tripsaceae, is considered by some authors to be merely a subtribe under the Andr0pogoneae. It is a small group of highly special— ised monoecious grasses, again primarily of trepical and subtropical distribution with a few temperate zone outliers. In general, the Gramineae are a difficult group taxonomically and the Panicoideae are probably the most difficult members of the family because of their high degree of specialization. The problem is further complicated in Michigan by the fact that only the fringe members of the subfamily are to be found here. HISTORICAL BACKGROUND The historical study of the Panicoideae in Michigan began, as indeed did all floristio studies in Michigan, with the publication of John Wright's catalogue (1839). In this work fifteen taxa of the subfamily were listed as occurring in the two southernmost tiers of counties. Sub— sequent to this publication, and as a result of more extensive collection, numerous catalOgues and lists were published. Some of these were local floras and some were, general statewide treatments. The more important of these were published by E. C. Almendinger (1876), W. J. Beal and c. r. Wheeler (1892), E. J. Cole (1901), r. P. Daniels (1904), c. A. Davis (1898, 1900), c. K. Dodge (1900) and N. H. Winchell (1881). In 1904 Dr. W. J. Beal published his 'Michigan Flora“. This annotated checklist was a compilation of floristio - data from several herbaria in the state, from lists of local flora furnished by various contemporary botanists, and from previous publications. A supplement was published a few years later by Dr. Beal (1908). Although leaving much to be desired as regards completeness, and both nomen- clatural and distributional accuracy, these two publica- tions are still the only sources of information on the .3 flora of the state as a whole. In these two papers are found the names of forty-one of the Panicoideae known to occur, or reported to occur, in Michigan. During the forty-four years that have elapsed since the publication of the supplement to 'Michigan Flora', the knowledge of the vegetation of the state has been extended by both more extensive and more intensive collecting which have resulted in a great increase in the number of records and specimens on deposit in various herbaria. Several important groups of plants have been the subject of study by botanists in the state and many reports of the flora of different localities within the state have been published. Among the more important of these are county or regional floras by u. r. Bingham (1945), H. r. Darlington (1921, 1923), C. K. Dodge (19213, b, c, e), c. R. and F. N. Hanes (1947), and B. A. Walpole (1924). Numerous other papers which contain references to members of the Panicoideae in Michigan are cited in subsequent pages of this report and in the bibli0graphy. One important group of Michigan plants, which has not been reported.upon from the floristio point of view is the grasses. This is unfortunate, since in all of the adjoin- ing states -- Ohio, Indiana, Illinois, and Wisconsin -- the patterns of distribution are known, either as the result of general floristio or specialized agrostological publications. 4 It seems indeed strange that W. J. Beal, although he was the author of 'Grasses of North America' (1896), never published a similar work on the grasses of Michigan. MATERIALS AND PROCEDURES To obtain information to fill in at least a portion of the distributional pattern for the grasses of Michigan, a study of the widely scattered literature references and an examination of herbarium voucher speciamens was under- taken. In making this study the available published lit- erature was searched for references to the occurrence of Panicoideae in Michigan. The bibliography published by H. T. Darlington in his “Taxonomic and Ecological Work on the Higher Plants of Michigan" (1945) was extremely valuable as a guide to the pertinent publications. Another source for reports of occurrence of these grasses is the unpublished card file (Michigan State College, 1950) in the Beal-Darling- ton Herbarium, Michigan State College. This is a valuable source since it contains records of determinations of plants sent in for identification and frequently these are from areas not covered by published reports. A letter from Dr. Albert DeLisle (1951) contained information on a number of collections in southwestern Michigan. All of the mounted and.unmounted specimens of Panicoid- eae in the Beal-Darlington Herbarium were examined as were all of the specimens loaned to the author by the curators of 6 the herbaria at the following institutions: Cranbrook Institute of Science, Bloomfield Hills, Michigan; Division of Botany and Plant Pathology, Department of Agriculture, Ottawa, Ontario, Canada; Houghton Lake Wild Life Experiment Station, The Heights, Michigan; Michigan State Normal College, Ypsilanti, Michigan; University of Michigan, Ann Arbor, Michigan; University of Notre Dame, Notre Dame, Indiana; and Western Michigan College, Kalamazoo, Michigan. In addition, the author spent several days at the University of Michigan studying certain materials in the herbarium. The herbaria of Albion College, Albion, Michigan and C. F.) and R. N. Hanes, Schoolcraft, Michigan, were not examined because of lack of time and finances. A1t0gether, approximately 1900 specimens were examined in the preparation of this treatment of Michigan Panicoideae. COMMENTS ON HABITATS AND DISTRIBUTION Habitats The Panicoideae are generally considered to be plants of sandy, sterile, Open ground. This generality holds true for the majority of the species found in Michigan. Although habitat notes are given for each species in the taxonomic portion of this report, it seems appropriate to mention here a few species found in habitats which are markedly different than that which is usual for the subfamily. ' There are a few species which'are usually found in wet places, b0gs, marshes, edges of streams and lakes, and other similar spots. These include: Echinochloa walteri, Panicum agrostcides, Panicum dichotomiflorum, Panicum im licatum, Panicum lucidum, Panicum microcarpon, and.Panicum spretum. Moist locations with fairly good 8011, such as the edges of woods, are the habitat of another group, including: Panicum boreale, ngicum clandestinum, Panicum flexile, Panicum oligosanthes, Panicum tennesseense, and Tripsaoum dacyloides. Notable among the typical woodland species are: Panicum ashei, Panicum boscii, Panicum commutatum, and Panicum 1gtifglium. 8 Distribution The distribution of the Panicoideae in the immediately adjoining states and in the United States as a whole is well known and this information is readily available in a number of publications (0. 0. Deam, 1929, 1940; u. L. Fernald, 1950; N. C. Fassett, 1951; A. S. Hitchcock and.A. Chase, 1951; G. H. Jones, 1945; J. H. Schaffner, 1932). Therefore, it was not considered necessary to include this information for each species in this treatment. In addition to the detailed listing of specimens in the taxonomic portion of this treatment, a series of maps (Maps 2-64) was prepared to show the distribution of each species. on these maps the presence of the species was indicated for each county and island from which a specimen was examined; literature reports, not confirmed by specimens, are not indicated on these maps. A summary, by counties, of the known distribution within Michigan is also included (Map 1). Distributional Patterns An examination of the distribution maps of Michigan Panicoideae included in this report reveals several more or less distinct patterns of distribution. These may be designated as follows! 9 1. Species of statewide distribution. 2. Species of the southern half of the lower penin- sula, with scattered distribution in the upper peninsula. 3. Species of the entire lower peninsula. 4. Species of the southern half of the lower peninsula. 5. Species of restricted distribution or of rare occurrence. 6. Introduced weeds or waifs. It is of interest to note that no species is restricted to the upper peninsula; this is as expected because of the tr0pica1-subtropica1 affinities of the subfamily. The delimitation of the groups of species representa- tive of each of the patterns is, of course, somewhat arbi- trary and is based on the specimens which the author has examined. As will be brought out later in this report, Ithe collecting in Michigan has been lamentably insufficient, and serious errors in the distributional pattern of individr ‘ual species may be attributable to this cause. The author does not wish to speculate at this time on possible causes for the distributional patterns which are shown here, since such speculation should be based on a consideration of a much larger segment of the state flora. However, in the 10 following paragraphs the general distribution of the species assigned to each of the pattern-groups will be mentioned. Species g; statewide distribution. These species all have general distributions, in which Michigan is well in- cluded, running from Maine or Nova Scotia in the east to Wisconsin, Minnesota or farther west, and thence southward. Included in this group are the following seventeen species: Andropogon gerardii Panicum meridionale ' scoparhus " ,pseudopubescens Cenchrus pauciflorus ' subvillosum Panicum boreale ' tsugetorum .____,_..______. " caesium " 2289.919 ' depauperatum ' ‘Igggggl ' huachucae ' xanthophysum ' implicatum Sorghastrum nutans ' linearifolium Species of the southern half of the lower peninsula with scattered distribution in the upper peninsula. These species, in part, have the same general distributions as those of the preceding group. Some of the species have slightly more southern patterns, however, so that Michigan represent- atives are on or near the northern edge of their range. This pattern, in some instances, suggests the possibility that the upper peninsula distribution has arisen a8 a result of an incursion from Wisconsin. 0n the other hand, it may be only indicative of the relatively small amount of ll collecting in much of the northern half of the lower peninsula. Eight species are included in this group as follows: Panicum clandestingm Panicum flexile ' gglumbiangg, ' perlonggg ' dichotomiflorum ' praecocius ' dichotomum ' Eggibneriaggm Species of the entire lowegpeninsula. These species also have essentially the same general distribution as the first group. The four following species are in this group: Panicum latifolium. Panicum tennesseense ' lindheimeri ' villosissimum §pgg$gs of the southern half of the lower peninsula. The general distributions of these species are such that Michigan lies very close to the northern edge or is actually on the northern limit of their range. In Michigan these species extend northward as far as a line running westward from the southern end of Saginaw Bay. This group consists of the following nine species: thinoghloa walteri Panicum oligosanthes Leptoloma cogngtum ' philadelphiggm Panicum aggostoides ' sphaerocarpon Panicum commutatum Paspalum pgbescens " 121331211 Species of restricted distgibution or of rare occur- rence. Most of these species occur here on the limit of their 12 range or as outliers separated from their main distributional areas. None of these species are represented by specimens from more than three counties. Species which apparently are confined to the southeastern or southwestern sections of the lower peninsula are so indicated by parenthetical abbrev- iations Just below. Fourteen species are included: Andr0pogon virginicus (S.W.) Panicum boscii Digitaria filiformis (S.W.) ' commonsianum (S.W.) Panicum addisonii ' deamii (S.W.) ' albemarlense ' lucidum (S.E.) ' gghg; ' microcarpon (S.E.) ' barbulatum (S.W.) ' spretum ' bicknellii (S.E.) Tripsacum dactyloides (S.E.) Tripsacum dactyloides perhaps should be included in the next group since both specimens seen were collected along rail- roads and the distribution given for the species by Cutler and Anderson (1941) is more southern. Introducegggeeds 9;:waifs. This group consists of eleven species which have become naturalized or have been collected as escapes from cultivation. The species are: Digitaria ischaemum Setaria lutescens ' sanguinalis ' verticillata Echinochloa colonum (rare) ' viridis ' crusgalli Sorghum halepense Panicum miliaceum ' vulgare Setaria italica 13 TAXONOMIC TREATMENT Nomenclatural Considerations The basis of the taxonomic treatment of the genera and species included in this study has been the Manual of the Grasses of the United States, ed. 2 (Hitchcock and Chase, 1951). The nomenclature used herein is essentially in accordance with this manual. However, since the eighth edition of Gray's Manual (Fernald, 1950) is so widely used, a comparison of the nomenclature of the two volumes is of interest to workers in agrostology. The nomenclature of the taxa found in Michigan, accepted by Fernald, agrees with Hitchcock and Chase except as indicated in the following list; the name used by Fernald is given first in each case, followed by the equivalent name used both in Hitchcock and Chase and in the present treatment. Cenchrus longispinus (Hack.) Fern. = g, pauciflorus Benth. Panicum columbianum Scribn. =‘E, tsugetorum Nash ' commonsianum var. addisonii (Nash) Fern. =‘P. addisonii Nash ' commutatum var. ashei (Pears.) Fern. = P, ashei Pears. " dichotomum var. barbulatum (Michx.) Wood 3 _P_. barbulatum Michx. 14 Panicum lanuginosum var. fasciculatum (Torr.) Fern., in part 8 E, huachudhae Ashe ' lanuginosum var. fasciculatum (Torr.) Fern., in part = E: tennesseense Ashe ' lanuginosum var. implicatum (Scribn.) Fern. = 2, implicatum Scrifin. ' lanuginosum var. lindheimeri (Nash) Fern. =.§. lIndhéImeri Nash ' oligosanthes var. scribnerianum (Nash) Fern. = P, scribnerianum Naéh ' villosissimum var. pseudcpubescens (Nash) Fern. =‘P. pseudcpubescens Nash ' wilcoxianum Vasey, in part =‘P. deamii Hitchc. and Chase Paspalum ciliatifolium var. muhlenbergii (Nash) Fern. = P, pubescens Nash Setaria glauca (L.) Beauv. =I§, lutescens Weig. The names listed above from Gray's Manual, together with other synonyms applied to Michigan Panicoideae by various authors and collectors, have been included under the currently accepted names, The synonymy also includes the names of varieties that the author believes do not merit separate consideration for various reasonS. The list of synonyms given for a particular species is generally not complete, but all of the names which the author has found applied to Michigan species and has been able to assign to their correct places are included. While tracing synonymy many references in addition to Hitchcock and Chase were consulted. Some of the more important of these references are: W. J. Beal (1896), 15 N. L. Britton and.A. Brown (1898), A. Chase (1908, 1908a, 1908b, 1911), J. r. Henrard (1951), A. s. Hitchcock (1915, 1951), F. Lamson—Scribner (1888, 1900a, 1900b, 1901a), and G. v. Nash (1909, 1912, 1915). The problem of recognition of varieties was considered by the author during the earlier phases of the study. As more and more specimens were examined, it became apparent that one could only recognize these varieties by erecting arbitrary and artificial limits. Since the concept of a species as currently held by this writer is broad enough to allow for a certain degree of natural variability, he was ' unwilling to recognize a series of snbspecific entities in a group already burdened with taxa of specific rank. The keys which the author uses are especially designed for the Michigan taxa. They were adapted, with a minimum of alteration, from those found in edition 2 of the "Manual of the Grasses of the United States". This author found them quite satisfactory and can find no legitimate reason to drastically alter them. Doubtfully and Erroneously Reported Species A number of references to species that apparently do not occur in Michigan were found.in the literature. In some cases it was possible, by examination of specimens, to attribute such reports to misidentification. Other reports 16 were for species which might possibly occur in Michigan, but for which no corroborating specimens were seen by the author. The status of such species must remain doubtful until voucher specimens are obtained. These doubtful or erroneously reported species have been excluded from the keys and species lists in this paper.) A list of the excluded species, with remarks concerning them, follows the treatment of each genus for which they have been reported. Numerical Summary of Genera and Species Thirteen genera were included in this study for the sake of completeness, although two of them cannot be said to constitute a persistent part of the flora of the states Approximately 1900 specimens were examined which represented 11 genera and 63 species. W. J. Beal (1904) included eight genera and 41 species of Panicoideae in the Michigan flora. The genus Leptoloma which Beal omitted is definitely indig- enous and fairly widespread in the southern half of the lower peninsula. As for the other two genera which were not included in the 1904 flora, Sorghgg includes an introduced weed.and a cultivated waif and the single species of Epip- gggpg also may be an introduction. Additional species in various genera, not reported by Beal, are Echinochloa colonum, Digitaria filiformis and l7 Andropogon virginicug; none of these is at all common. The greatest difference, with respect to number of species, is to be found in the genus Panicum where Beal listed eighteen fewer taxa than are given in this report. This is due in part to additional collection, and in part to revisions and new descriptions of the type that make two species grow where only one species grew before. -An attempt has been made to summarize the information contained in the lists of specimens examined and in the species distribution maps in a graphic manner. By means of a cumulative map (Map 1), it was thought that an idea of the concentration of the number of species per county could be .obtained. In the preparation of this map it soon became apparent that, while it does show the number of species known from each county, it shows even more graphically the need for additional collecting in this state. Nine counties, more than ten percent of the counties in the state, have no known representatives of the Panicoideae. Thirty-nine counties, nearly half of the counties in the state, have five or fewer known species. This is certainly not due to the distribution of the grasses, as the number of species known from Keweenaw, Cheboygan, and Emmet counties will show. It means, simply, that much more work needs to be done in the field before an adequate knowledge of the Michigan flora can be obtained. 18 Explanation of Abbreviations 0n the following pages are found the data gathered from perusal of the literature and examination of the spec- imens. These data were organized into separate sections for each taxon under consideration. Under the heading, 'Specimens examined,“ the following information is given: 1. county in which the specimen was collected (if the specimen was collected on an island, it is recorded under a subhead following the county to which the island is politically attached); 2. the abbreviation for the collector's name and the collector's number, when known; 3. in parentheses, the abbreviation for the herbarium in which the specimen is deposited and the herbarium number for those herbaria using a number system. under the heading, 'Unconfirmed reports,‘ are listed reports, from the literature and other sources, which were not corroborated by specimens. These are listed by county and island in the same manner as the data on specimens exams ined. The name of the author of the report is followed by a date in parentheses which refers to the bibliography. For the sake of conciseness in the portion of this report which follows, abbreviations were used to indicate the herbaria in which the specimens are deposited and to indicate the collectors of the specimens. For the eight 19 herbaria single letters are used which are placed in paren— theses as indicated above. For the 123 collectors, groups of one to three letters are used. Abbreviations of herbaria Division of Botany and Plant Pathology, Canadian Dept. of Agriculture ' Cranbrook Institute of Science University of Notre Dame Houghton Lake Wildlife Experiment Station University of Michigan Michigan State Normal College Michigan State College Western Michigan College amzxmbo > Abbreviation§_9f Collectors A Austin AD A. Dachnowski ADG A. D. Geis AJP A. J. Pieters AM A. Murie ARW A. R. Wheeler BAW B. A. Walpole BB B. Barlow B&D E. A. Bessey & H. T. Darlington B&W W. J. Beal & C. F. Wheeler CAB C A. Brown CAD C. A. Davis CB C. Billington CCD Mrs. C. C. Deam CDL C. D. LaRue CDM C. D. McLouth CDR C. D. Richards CFW 0. F. Wheeler CG Mrs. C. Goodrich CHK C. H. Kauffman CH8 0. H. Stocking CKD C. K. Dodge CMR C. M. Rogers 00E C. O. Erlanson COG CWB C&C' 0&8 DAP D01 D00 DH DiA DMB DML DSF D&F D&M EAB EJC 91999990 '90 KN'IEIW'IJ’IJH'EI"! “HHHHHHHH flflaflbmeUUUU mmoao e as 20 . Grassl . Ball . Bazuin . Camp & D. R. Camp . Cain & Segadas-Vianna #:1152110 b Pelton Clarke Clark Cooley Higley ngelo M. Brooks M. Lynch, Jr. Dore, H. A. Senn & Frankton Dore & Frankton Drew & R. S. Hauser Dore & R. McVaugh Bessey Almendinger Cole Hill Morris Erlanson & S. H. Emerson Lake Erlanscn . Ehlers & L. Ehlers mamarqgo? ammo Clements Cobb E. Woods G. Gustafson J. Hermann P. Daniels L. Fernald &.A. 8. Peace A B . Loughri dge Sudworth 913 (initials only) D. Sones Lauff L. Amos Stewart . W. Bradford W. Parmalee H. Graper & E. O. Vaughan LKL MTH PAH PJP P&H RM RRD 21 Skeels Iltis Campbell; Pepoon Darlington Thomson Hyypio & J. T. Massengale 5,80)ng J. Contrall Knobloch B. McFarlin 0. Elliot Dawson H. Ehlers . M. Sutton r . J. T. Boyce Kauffman & B. Kanouse E" . Kenoyer . Becker Harvey Pennington Shinners Ludwig Ryel 5999* 3’“ 00 ' H p 2UP- 002 p. 0) E. McDonald . H. Clark M. H. Winchell M. Pengelly lst Michigan Survey M. T. Bingham M. T. Hall KKK: t‘t‘r‘t‘t‘r‘t“ O Static-itch HH mmmmmmm Niswander P. A. Hyypio P. J. Podolski G. W. Parmalee & P. A. Hyypio Ransom R. McVaugh R. R. Dreisbach 22 m 5 o :3 wumumaomb B: :1: 0mm Camp Skeels & J. Shaddick P. Marshall Spalding McMullen . Drew ook Dore Lovejoy Beal Cooper Wheeler & G. H. Hicks Wheeler & Longyear 0-! ZBUJCD <1 0333228! $3 Collector unknown 23 KEY TO THE TRIBES OF THE PANICOIDEAE Glumes membranaceous, the sterile lemma like the glumes 1n textureOOOOOOOOOO00.000.000.000.OOOOOOOOPaniooaOO (p. 24) Glumes indurate, fertile lemma and palea hyaline or membranaceous, the sterile lemma like the fertile one in texture 2. Spikelets in pairs, one sessile and perfect, the other pedicillate and usually staminate or neuter; the pedic- illate one sometimes absent. ........ Andr0pogoneae (p. 82 2. Spikelets unisexual, the pistillate below, the staminate above. ....... ........................Tripsaceae (p.‘90 24 TRIBE PANICEAE Key to the Michigan Genera 1. Spikelets subtended or surrounded by 1 to many distinct or more or less connate bristles, forming an involucre 2. Bristles persistent, the spikelets deciduous ..l. Setaria 2. Bristles falling with the spikelets at maturity 3. Bristles not united at base, slender, often plumosc .. ................ ............2. Penniseggm 3. Bristles united into a burlike involucre, bristles retrorsely barbed ..... ........ .......3. Cenchrus l. Spikelets not subtended by bristles 4. Glumes or sterile lemma awned ..........4. Eghinochloa 4. Glumes and sterile lemma awnless 5. Fruit cartilaginous-indurate, flexible 6. Spikelets in slender racemes more or less digitate at the summit of the culms ..........5. Digitazia 6. Spikelets in panicles ...............6. Leptoloma 5. Fruit chartaceous-indurate, rigid 7. First glume absent, spikelets subsessile in spike- like racemes ........................7. Paspalgm 7. First glume present, spikelets usually in panicles ........ ...... ..............8. Panicum 1. SETARIA Beauv. Ess. Agrost. '51, 178, 1.,13, f. g. nom. en. conserv.). 1812; non Ach. (1798) nec uIEEk. 1803 . Chaetochloa Scribn. U. S. Div. Agrost. Bul. 4: 38. 1897. 25 A genus of about 100 species in the warmer regions of the world plus a few weedy species in the temperate regions. Four of the latter are found in Michigan Key to the Michigan Species 1. Bristles below each spikelet numerous, at least more than 5; fruit strongly rugose..................l. S, lutesgegg l. Bristles below each spikelet l to 3, or by abortion of the spikelets, 4 or 6; fruit smooth or rugulose. 2. Bristles more or less retorsely soabrous...........................2..S. vertigillgtg 2. Bristles antrorsely scabrous only 3. Panicle cylindric, tapering above, green; spikelets falling entire..........................3. _8_. mm 3. Panicle lobed or interrupted, often large and.heavy, purple or yellow; fruit deciduous from glumes and Starile10mm.......oo...o..o.....oo....4o§.M 1. Setaria lutescens (Weig.) Hubb. Rhodora 18: 232. 1916. Paniggg lutescens Weig., Obs. Bot. 20. 1772. Setaria glauca Beauv. Ess. Agrost. 51, 178, 1812. Chaetochloa lutescen (Weig.) Stuntz, U. S. D. A., B. P. . nventory seeds 31: 36, 86. 1914. Chaetochloa lauca var. r rea Farwell Mich. Icad. Sc . ap. 26: E. 1941. ’ . ‘wr. Yellow Bristle grass. Cultivated soil and waste places; a common garden weed. Map no. 2. 26 Specimens examined: ‘BAX QQ. GWB(S). BERRIEN 99, CB (914288, I). CHARLEVOIX _C_q. THM 612(8124340). CHEYBOGAN gg. JHE 1119(n, 914720). CLINTON gg. GWP 409(9). GOGEBIC pg. B&D 2529(914753); HTD(M). GRATIOT 99. CAD(Sl4748). HOUGHTON pg. OAF 11536(Cl4403). m 95;. WJB(N); no 875(9); nus). JACKSON g9. THM 1631(8124370). KALAMAZOO 99. ADG(S). KALKASKA pg. LR 75(H, 9124721). £33192. 949(914751). KEWEENAW g9. OAF(361535); FJH 75101). W 99. THM 1670(3124371). LENAWEE 93. m 24(814735); JTB 4(9), 15(9). LIVINGSTON 99. DML(8123212). Mg 99. DCo(861534). w 99. MEM 5391(9). OAKLAND g), CB(W); MTB(01052); on 728b(M), 2837(014407), 2988 (014406), 7288(014405); GWP 1923(9). 5;. M99. CKD 262(814736), s.n.(M, 814328). §HIAWASEE pg. GWP 550(9). 1431 m _09. HSP 591(914793). WASHTENAW _CQ_. OAF 7521(014404): DH(M); AJP 1520:). m _C_Q. OAF 597b(olos4, n); PAH 249(9), 249(9). Unconfirmed reports: CHIPPEWA 92, C. K. Dodge (19210). GENESEE 99. use file (1950). mpg. Charity _I_e_. C. r. Dodge (1911). MACKINAC 92. W 31.. c. K. Dodge (1919). ungumr pg. 0. x. Dodge (1918). __T_. £99m c_0,. r. P. Daniels (1904b). SCHOOLCRAFT g_o_. C. 1:. Dodge (1921b). TUSCOLA 99. C. K. Dodge (1921a). 2. Setaria verticillata (L.) Beauv. E88. Agrost. 51, 178. 1812. Panicum verticillatum L. Sp. Pl. ed. 2. l: 82. 1762. Chaetochloa verticillata Scribn. U. S. D. A. Div. Agrost. l. 4: 39. 1897. --'~ 27 Chaetochloa verticillata var. breviseta (Godr.) arwell, Mich. Acad. Sci. Pap. I: 86. 1921. Eur Bristlegrass. Dumps and waste places; a rather uncommon weed. Map no. 3. Specimens examined: HOUGHTON 99. WDG(A). ‘199999‘99, P&H 3(9). lggggugg. owe 7097(9120307). MUSKEGON 99, owe 4942 (011158). WASHTENAW 99, JHE 2777(u); FJH 9254(u); BAW(Sl47lB). 15159.99. CB 18(M), e.n.(Closo, w); OAF 5570§(u), 5577§(u), e.n.(01091). Unconfirmed reports: KALAMAZOO 99. C. R. & F. N. Hanes (1947). OAKLAND‘99. MSC file (1950). 3. Setaria viridia (L.) Beauv. Ess. Agrost. 51, 178. 1812. Panicum viride L. Syst. Nat. ed. 10. 2: 870. 1759. Chaetochloa viridis Scribn. U. S. D. A. Div. Agrost. . 4: 39. 1997. Chaetochloa viridis var. breviseta (D0811) Farwell, Mich. Acad. Sci. Pap. I: 96. 1923. Green Bristlegrass. Cultivated soil and waste places; a common garden weed. Map no. 4. Specimens examined: '95:.99. GWB(S). CHEBOYGAN.99. JHE 169(M), 620(M), 1096(M, 914719), 1118(M); FOG 383(814742). CLINTON 99. DMB(S). 'Qggggflgg. CFW(861532). GOGEBIC 99. B&D 2522(914743), 2794(u). HOUGHTON 99, FJH 1575(n); CDR 28 2521 (M). INGHAM _gg. WJB(N, 914744, 914750); no 894(9); FAL(S); THM 859(9124018); N(Sl4739); R(Sl4747); 909(914755); 7 (951531). JACKSON 99. THM 1543(9124359). KALAMAZOO 99. Gav 113 (914754). 59311 pg. cws 5155(011159), 5809(8120304). ' KEWEENAW gg. 019(914741). pigs; 99. THM 1528(9124420). we; 99. DML(Sl232ll). MARQUETTE g), BB(Sl4738); n'r9(99249). MISSAUKEE pg. JCE(S). mpg. MEM 5301(9), 5585(9). 959199999. 08(01053, 01055); MTB(ClO63, 01054, 01055); OAF 5607a“): GWP 1922(9). 915% pg. CKD 250(914757), s.n.(M, 914325). 9997:1999 pg. GWP 379(8). TUSCOLA _qg. 9(914759). m _8_Up_E_N_ 99. HS? 459(914745). WASHTENAW 99. ' JD(M); OAF 7058(M): THM 1554(9124358); BAW(M). 1111999. OAF 593e(01057), 629a(01062,M), 6290(01066), 5398%(M), s.n. (01055). Unconfirmed reports: BERRIEN 99. use file (1950). CHIPPEWA 99. c. K. Dodge (1921c); use file (1950). 9m 99. r. 0. Gates 8. J. H. Ehlers (1925) use file (1950). m 99., Charity lg. C. K. Dodge (1911). MACKINAC gg. Mackinac _I_g. C. K. Dodge (1913). MUSKEGON gm, 0. D. McLouth (1895). 90H00LCHAP'I _qg. C. K. Dodge (1921b). 4. Setaria italica (L.) Beauv. Ess. Agrost. 51, 170, 178. "““"1§I§T"' Panicum italicum L. Sp. P1. 56. 1753. Panicum germanicum Mill. Gard. Dict. ed. 8. Panicum No. 1. 1768. 29 Chaetochloa italica Scribn. U. S. D. A. Div. Agrost. Bul. 4: 39.1897. Setaria italica f. raecox (Alef. ) Farwell, Mich. Acad. Ci. 6p. 33' £79. 1921 Setaria italica var. germanica f. me 2 eri (Koern.) arweII, Mich. Acad. Sci. Rep. 22: 1921. Chaetochloa italica f. praecox (Alef.) Farwell, Acad. Oi. ap. 1: 86. 1933. Chaetochloa italica var. ermanica f. metzgeri Farwell uich. A'c'e'd."Sc'i. Paps—1"“. : 85“. 1923. ' Foxtail Millet. Escaped from cultivation. Map no. 5. Specimens examined: .gggugg. GWB(S). .99991.99. JHE A 1207 (11, 91-4724). 139319;. WJB(814728); uc 882(8), 892(9); 011(914731). £93199. GDI(M); GDS(Sl4334). KEWEENAW 99. 0111914729). LENAWEE 99. CHS(M). 91. g_L_g_I_13 gg. CKD(u). WASHTENAW gg. BAW(M). 11111; @. 08(C1059); OAF 593a(01057, 914721), 593d(OlO58), 7813(M). Unconfirmed reports: CASS _qg. use file (1950). CHEBOYGAN pg. 1‘. C. Gates .4 J. H. Ehlers (1925). OAKLAND _C_0_. u. 'r. Bingham (1945). 911., JOSEPH 99. r. P. Daniels (1904b). Excluded Species Setaria faberii Herrm. Reported for Michigan by Hitch- cock and Chase (1951), but no specimens were seen by the author. It is a rapidly spreading weed and probably occurs in Michigan. Setaria ggniculata (Lam.) Beauv. Reported by Farwell 30 (1941) under the synonym Chaetochloa geniculata var. pgrpgras— .9939 (E11.) Farwell. No specimens were seen. This species has a somewhat more southern distribution and probably does not occur in Michigan. 2. BENNISETUM L. 0. Rich. in Pers. Synops. l: 72. 1805. One species, 2. gillgggm R. Br., is cultivated for orna- ment and escapes occasionally. It has been reported for Michigan by Hitchcock and Chase (1951), but the author has seen no specimens. The genus is included here for the con— venience of those who might encounter this grass in Michigan. ‘ 3. CENCHRUS L. Sp. P1. 55. 1753. About 25 species of the American trOpics and subtrOpics. One species extends northward into cooler temperate regions and is found in Michigan. 1. Cenchrus pguciflorus Benth. Bot. Voy. Sulph. 56. 1840. Cenchrus tribuloides)of many Michigan authors, but not of L. (1753 . Cenchrus carolinianue of many Michigan authors, but probably not of Walt. (1788). Cenchrus echinatus var. tribuloides of some Michigan authors, but not of Torr. (1923). Cenchrus longispinus (Hack.) Fern. Rhodora 45: 388. I943. Sandbur. Sandy Open ground; often a troublesome weed. Map no. 60 p 31 Specimens examined: 99199. GWB(S). BERRIEN 99. GLA (u). CALHOUN 99. WJB(814449). CHEBOYGAN 99. JHE 1221(u). M99. HTD 744(914453). 9999999. AD(M). GRATIOT 99. CAD(312748). mg 99. WJB(N); WGD 10369(A); THM 971 (9124423); GWP 415(9). 3999999. GAL 4173(1). mg. E&E 1221(914445). JACKSON 99. Tim 1538(9124414). KALAMAZOO 99. DH u130(9). 9191999. HCS(814447): 949(9120130). LENAWEE 99. CB(C792); JTB 105(9). LIVINGSTON 99. JHE 5198 (u); FJH 5445(u); DML(8123213). MACOMB _C9. DCo(Sl4450). MENOMINEE 99. COG 252501), 253901). 99999999. FJH(Sl4452); usu 5297(9), 5394(9). NEWAYGO 99. RM 9852(u); Tim 1513 (9124413). OAKLAND 99. CB(C741, w); MTB(C743, C744); OAF 5518b(u); JMS 119(u). ISAGINAW 99. DCl(861536). 91;. 9999 99. CKD(u). WASHTENAW 99. EDA(M—2 sheets); FCO(M); FJH 9173(D21941, 1:); RM 7594(u); AJP 141(u), s.n.(M); BAW(M). 99111999. OAP(C9705, u-2 sheets); Hau 187(9129952); 99 (914444, 914445): 1(u). ‘ Unconfirmed reports: CHIPPEWA 99. C. K. Dodge (19210). CLINTON 99. usc file (1950). mg. F. 0. Gates 4 J. H. Ehlere (1925). MACKINAC 99. Mackinac _I_g. C. K. Dodge (1913). MANISTEE Q. r. P. Daniels (1904a). Kingdoms 99. C. K. Dodge (1918). MUSKEGON 99. C. D. ucLouth (1904a). PREQUE I_9_I_.E_C_O. use file (1950). SCHOOLCRAFT 99. C. K. Dodge (1921b). E. 999999 99. use file (1950). TUSCOLA 99. C. K. Dodge (1921d). _- 32 Excluded Species Cenchrus tribuloides L. The many reports of this species for Michigan are based on misidentifications of,§. pguciflorus Benth. 4. ECHINOCHLOA Beauv. Ess. Agrost. 55, 1,. _1_1_. 1913. A genus of twenty annual or perennial tr0pica1 and sub— tropical species, scme of which extend northward into the temperate regions. Three of the latter are weedy species found in Michigan. Key to the Michigan Species l. Racemes simple, 1 to 2 cm. long; spikelets crowded in about 4 rows; the awn of the sterile lemma reduced to a short point ..............1..§. 9010999 1. Racemes more or less branched, usually more than 2 cm. long; spikelets irregularly crowded and fascicled, umually not arranged in rows, the awn of the sterile lemma variable 3. Sheaths smooth; panicles erect and stiff; spikelets conspicuously hispid ................2. E, gzggggllg 2. Sheaths, at least the lower, hispid or scabrous; panicle dense and nodding; spikelets long-awed eeee ooooooo 0.000000000000030 20m 1. Echinochloa colonum (L.) Link. Hort. Berol. ,2: 309. 1833. Panicum colonum L. Syst. Hat. ed. 10. s: 870. 1759. Jungle Rice. Waste places. lap no. 7. Specimen examined: guys 9_. OAF 9905(014494). 93 Unconfirmed report: VAN BUREN 99. N90 file (1950). 2. 29919999129 mg; (L.) Beauv. E99. Agrost. 59, 161. 1812. Panicum crusgalli L. Sp. P1. 56. 1753. Panicum crusgalli var. pgrpgreum Pursh, Fl. Amer. Sept. . 1814. Panicum cru9g9lli var. muticum Ell. Bot. S. C. and Ga. : 4. 8 60 Panicum crus alli var. mitis (Pursh) Psterm. F1. Lips. 83. 1838. Panigum crus alli var. muricatum (Michx.) Farwell, Mich. cad. Sci. ep. 6: 210. 1904. Echinochloa crus alli var. frumentacea (R0xb.) W. F. Wright, Cent. Uict. Sup. 810. 1909. ' Echinochloa muricata (Michx.) Fernald, Rhodora 17: 106. 19 50 Echinochloa crus alli f. mitis (Pursh) Farwell, Mich. Icad. Sci. ep. 21: 349. 1920 Echinochloa crus alli f. r urea (Pursh) Farwell Mich. cad. sfi. eT. 21: 54 . 920. ’ Echinochloa crus alli var. muricata (Michx.) Farwell ic . Acad. 301. Rep. 21: 350. 1920. , Echinochloa crusgalli var. zelazensis (H.B.K.) Hitchc. U. S. D. A. Bul. 772: 238. 1920. Echinochloa pgggsns (Poir.) Rydb. Brittonia l: 81. 1 31. Echinochloa crusgalli f. zela ensis (H.B.K.) Farwell, Rich. Acad. Sci. Pap. 2%: Z. 1941. Barnyard Grass. Hoist open places, ditches, cultivated fields and waste ground; a common garden weed. The high de- gree of variability which this species exhibits is responsi- 34 ble for the multiplicity of names which have been assigned to its various phases. Hap no. 8. Specimens examined: AL§§5.99. WGD 10410a(A). 99351999. IK(9). 99199. GWB(S).. BERRIEN _C_0_. GLA(N); 09(914458); HTD 1690(914470). w 99. Js(S14499). 9999 99. GB (01069); HTD(914499); :(914497). CHARLEVOIX 99. 99933; _I__e_. NOR 1151(0777). CHEBOYGAN Q. JHE 189(M), 61901), 1106 (N, 914459); 11901). CHIPPEWA 99. NH 7029(11). CLINTON 99. CL 25 (9); B&W(N); 095(014095). GOGEBIC 99. mm, 914465). GRATIOT 99. CAD(914469). BOUGHTON 99. OAF 11555(014010)_; FJH 15-76(H); CDR 262?”). m _09. NJD 581(914467), s.n. (915099); NC 949(9), s.n.(S); FAL(S); ran 966(9124016); GNP 247(9); 0N(Sl4463); 019(914490, 914499). JACKSON 99. 11901). 399999. 059 1955(9122474), s.n.(S); S&S(Sl4498). KENEENAN 99. OAN 649(014011), e.n.(995954). 949999. rm: 1650 (9124417). 1.539939 99. ran 1672(9124416). LENAWEE 99. '38 15(995955); JTB(S). LIVINGSTON 99. DNL(9125207, 9125209, 9125209, 9125210). NACKINAC 99. NGD 105960); 2211131290 1;. ITB(0776). 39991999. DCo(961509, 961510, 995951, 995959). “1290an 9_. AD(N); OAF 646d(015796). N99091: _C_0_. RRD 525601). NENONINEE 99. COG 251901), 252001). HONTCALM 99. 0FW(861508). w 99. CAP 7075(014012); mm 5520(9), 5551(9), 5565(9). NUSKKGON 99. 7(914469). OAKLAND 99. Gem; NTB(0779, 0779); CA! 949o(0157s7), 6555 (015795, N), 6950(015795, u). SOHOOLORAFT 99. NGD(A). 55 97. CLAIR 99. 90(9); CKD 254(914460), e.n.(M-2 sheets, 914471, 914472). VAN BUREN 99. HSP 555(914464). NASHTENAN 99. ECA(u-2 sheets); Feo(u); JD(N); 049 5542(015791); FGG(K); Tau 1665(9124415); AJP 156(u); 957(u-2 sheets); 94w(u, 914457); 7(9). ggzgg‘gg. 09(0775, 0790); OAF 649s(015799, u), 648b(013983, u), 1701(015792, u), 1701§(0157s4), 1792 (015779), 1991(u), 1991§(015792, u), 7917(015791, u), 9741 (015799). 9749(015790, u). unconfirmed reports: CLARE‘QQ. ISO file (1950). EHMET.QQ, r. 0. Gates 9 J. H. Ehlers (1925). GENESEE‘QQ. use £11s(1950). HILhSDALE‘QQ.— use file (1950). HURON Cg. Oharitx £3. 0. K. Dodge (1911). KALAMAZOO 92. C. a. a. F. N. ashes (1947), use file (1950). LEELANAU‘gQ. use file (1950). IIDLAND Cg. u90111e (1950). NEWAYGO‘QQ. use file (1950). OSCEOLA‘QQ. use file (1950). 090004 99. use file (1950). 077492 99. use file (1950). WEXFORD‘QQ. use file (1950). 5. Echinochloa walteri (Pureh) Heller, Cat. N. Amer. F1. ed. 2. 217"1§60. Panicum walteri Pureh. F1. Amer. Sept. 66. 1814. Panicum crus 111 var. hieniggg A. Gray Man ed. 5. 649. 18%1; perhaps not 0 E11. (1616). Panicum.crusg%111 var. walteri (Pureh) Farwell Mich. 109 . c . ep. 3: 36. 1901. ’ Echinochloa walteri f. laevigata Wieg. Rhodora 23: 62. 921. Echinochloa crus alli var. his ida (Huh1.) Farwell, Amer. idl. at. 9: 862. 85. 36 Echinochloa crus alli var. his ida subvar. laevigata —"“‘(T—1eg.) F's—rand , Amer.-V—Jid12-—. Nat. 9: 262. 1925. Wet places and waste ground; an infrequent weedy species. Map no. 9. Specimens examined: BERRIEN _C_0_. GLAW). GRATIOT 953. 041304). INGRAM 99. 01104). KALAMAZOO go. 1410!). w 09. CAP 7075(u); uEu 5469(9). 93. M29: new); 7190 (914462); CKD 250(914461), s.h.(u-2 sheets). WASHTENAW Cg. 09(u). meg. OAF 1679(015790, u), s.n.(u). Unconfirmed reports: CLINTON g9. I. J. Beal and C. F. Wheeler (1992). KENT £0. E. J. Cole (1901). MUSKEGON 09. C. n. ueLeuth (1996). ' Excluded Species Echinochlcaieruegalli f. longiseta Farwell. Reported by Farwell (1920), this name is based.upcn Panicum crusgalli var. longieetum Trin., a taxon not known to occur in America. Farwell probably had REALM M Torr. (‘3 W m; I. W lieg.) in mind. Echinoch; a gruepgvonie (H.B.K.)Schult. Reported by Farwell (1920) under the synonym Echinochloa 919999111 1'. sabulonum (Trin.) Farwell. Farwell later (1921) corrected the latter name to E. Ml; 1. 5292112211 (Trim) Far- well. The Farwell collection, no. 1701i, upon which this report is based is an example of Echinochloa crusgglli. o O n a a e - o o o - Gr-- -- O O .. ~ . o . _ _ U 0 . — 1 A . O . . . O - -- . I ‘ - O . O -. _ _ O O O . .... .. “...—.--- ...n... O ... - . . - I. . . I ‘4 . . v- - -¢-‘ 0.. O -—0 -..--- ...... . --.. I \ 7 I . . , .... - ..-- ...“. 37 5. DIGITARIA Heist. ex Fabr. Enum. Pl. Hort. Helm. 257. I759. . Szntherisma Walt. F1. Carol. 76. 1788. A genus of over 100 species in the warmer regions of both hemispheres, some extending into the temperate regions. Three species are found in Michigan. Key to the Michigan Species l. Rachis wingless or with a very narrow mr81n000000000 000000 0.000000000000000 1020:111fozm13 l. Rachis winged or with a flat margin as wide as the central rib 2. Sheaths glabrous; spikelets 2mm. long 0.00.00.00.0000.00.00.000 2. D0 he m 2. Sheaths pilose; spikelets 2.5 mm. long ............. .......... 3. 2, sanguinalig. 1. Digitaria filiformis (L.) K091. Descr. Gram. 26. 1802. Panicum filiforme L. Sp. P1. 57. 1753. Szgtherisma filiformis (L.) Nash, Torr. Bot. Club Bul. 22: 420. 1895. Sandy fields and sterile open ground. Rare in Michigan. Map no. 10 Specimen examined: CASS 99. MS(K). unconfirmed reports: INGHAM‘QQ. 0. F. Wheeler and 9. F. Smith (1991), I. L. McAtee (1925). 38 2. Di itaria isehaemum (Schreb.) Sehreb. ex Muhl. Descr. Eram. 131. 1817. Panicum lineare Krock. Fl. 81199. 1: 95. 1787; not of L. (1762). Panicum ischaemum Sehreb. in Schweiger, Spec. Fl. Erland. . 1804. Digitaria humifusa Pers. Syn. F1. 1: 85. 1805. Panicum glabrum Gaudin, Agrost. Helv. 1: 22. 1829. Panicum humifusum (Pers.) Kunth, Rev. Gram. l: 33. Panicum labrum var. mississi iense Gatt. ex Scribn. Tenn. Igr. Expt. Stat. 551. 7: 39. 1844. S therisma linearis (Krook.) Nash, Torr. Bot. Club LET—H 2"—"2: 420“. 1995. S therisma isehaemum (Schreb.) Nash, N. Amer. F1. If: :51. 1913. Digitaria ischaemum var. mississi iensi (Gatt.) Fer- , nald, Rhodora 22: 153. I§20 Smooth Orabgrass. Waste places; often a troublesome lawn and garden weed. Hap no. 11. Specimens examined: 95199. GWB(S). BERRIEN 99. 09 (u). 249999. FCG 1490(u). QLINTON 00. GWP 409(9). GOGEBIC 09. EAB(Sl4454); B&D 265904, 914761). _I_Ilggfl _gg. lJB(Sl4767, 11). 1.93.9. 99. CAL 4199(4). _ng 99. THN 1629 (9124419). _I_JEVINGSTON _gg. DML(9125205). LAW 99. D00 (961526). uENOMINEE _C_0. 00G 2749(u). NEWAYGO Cg. D&H u291(s). OAKLAND _09_. 09(0771, u, w); OAF 1576(015905), 4594(015900, u), 7169(015797), 7619(u), 7652(015904, u), s.n.(0772). ROSCONNON 5p. HTD 549(914762). 91.419439 _eg. 59 0KD(u-2 sheets). m m 90. HSP 594(914765). WASHTENAW _gg. OAF 5554(015799, ‘14); FJH 9155(14); THM 1662(9124410). 14111909. A(914765); OAF 7245(015799, M), 1576a(015901), 12212(u). Unconfirmed reports: ANTRIM 09. use file (1950). CHEBOYGAN 99. C. 1:. Dodge (1921a). CHIPPENA 90. C. K. Dodge (19210). 222.14. 00. use file (1950). KALAquoo _09. C. R. and F. N. Hanes (1947). mpg. r. J. Cole (1901). use 1116 (1950). LENAWEE 90. use file (1950). MARQUETTD L. C. K. Dodge (1919). NUSKEGON _C_0_. 0. D. uoLouth (1996). OTTAWA 99. use file (1950). SAGINAW 09. use file (1950). _sCHOOLCRAFT _gl. 0. K. Dodge (1921b). SHIAWASEE _gg. use file (1950). 3. Digitaria7ganguinalis (L.) Scop. F1. Carn. ed. 2. 1: 52. Panicum sanguinale L. Sp. P1. 57. 1753. Szgtherisma sanguinalis (L.) Dulac. Fl. Haute. Pyr. . 86 e ' Di itaria san inalis var. re ens (Asch. & Graebn.) arwe l, mer. idl. Nat. : 23. 1926. Crabgrass. Fields, gardens and waste places; a trouble- some garden and lawn weed. Map no. 12. Specimens examined: BERRIEN Cg. GLA(u); 0301, 914455). 21mm 09. JHE 120901, 914770). INGHAM _gg. NJB(N); NC 959 (s); FAL(S); THu 967(9124017); GWP 414(9). JACKSON 99. THM 40 1657(9124412). KALAMAZOO'QQ. AHw 5904(u); us(u). .§§N;.gg. 909(914766); GL9(u). LENAWEE‘QQ. JTB 7(9). ‘glVINGSTON‘QQ. DuL(9125209). MENOMINEE.QQ. COG 5055(u). ‘u9N§g§.gQ. MEM 5299(9), 5595(9). NEWAYGO.QQ. EAB 1055(914771); THu 1605 (9124411). OAKLAND Cg. MTB(0774). §2,lgggl§.gg. CKD(M, 914456). ‘zgg‘ggggg.gg. HSP 560(914797). WASHTENAW.QQ. JD (u); OAF 1267a(015795); AJP 155(u); PJP(I); Nu). 1mg 09. CB(0773);‘0AF 1297(015794), 7954(015902, u), 7655(015799, u), 9640(015799); PAH 252(9). Unconfirmed reports: CALHOUN 99, use file (1950). OHIPPEWA‘QQ, 0. K. Dodge (1921c). GENESEE 09. use :11. (1950). ,QEANQ_THAVEHSE 99. use file (1950). HILLSDALE‘QQ. use file (1950). ggggg.gg. H. T. Darlington (1900). Charitz .19. C. 5. Dodge (1911). ‘ngggg 99. use file (1950). MECOSTA 99, use file (1950). MUSKEGON‘QQ. C. D. ucLouth (1999). OTTAWA'QQ. use file (1950). 92. JOSEPH‘QQ, F. P. Daniele (1904b). 6. LEPTOLOMA Chase, Biol. Soc. lash. Proc. 19: 191. """‘1§09. A genus of five species, three of which are Australian. The others occur in central and southern United States and Mexico; one of the latter is found in Michigan. 1. Le toloma co latum (Schult.) Chase Biol. 800. Wash. Proc. "2""I9:‘1§%T“1909. ' Panicum QOgQatum Schult. Mantissa 2: 235. 1824. 41 Fall Witchgrass. Dry soil and sandy fields. Map no. 13. Specimens examined: BERRIEN‘QQ. HTD 1731(914474). INGHAM‘QQ. es? 406(9). JACKSON 99, run 1655(9124406). ‘gggg.gg. ewe 2020(9122472). BABE 5599.1 THu 1675(9124406). LIVINGSTON‘QQ. DuL(9125204). NEWAYGO'QQ. THM 1611(9124409). OAKLANDIQQ. Hue(9124014); DSF 10363(A); THM 1661(9124405). 92, JOSEPH 99. em? 2499(9). NASHTENAW‘QQ. THM 1657 (9124407). Unconfirmed report: KALAMAZOO‘QQ. 0. R. and F. N. Hanes (1947). 7. PASPALUM L. Syst. ed. 10. 855. 1759. A genus of over 200 species, mostly in trOpieal America, with a few species in the Old World. Only one species is found in Michigan. 1. Paspalum pgbescens Muhl. in Willd. Enum. P1. 89. 1809. Paspalum muhlenbergii Nash in Britt. Man. 75. ‘1901. Paepalum ciliatifolium var. muhlenbergii (Nash) Fern. cdora 36. 30. 1934. Open ground, old fields, pastures and open woodlands. Hap no. 14. Specimens examined: BARRY.QQ. GNP 1103(8), 1120(8). KENT 99. ewe 6195(9), 6632(9120506). VAN BUREN 99. FCG 1543(u); 99? 196(914166), 372(914169). IASHTENAI‘QQ, FJH 42 9172(u); THM 1652(9124572); GWP 2569(9). WAYNE 0. 049 944e(e, u), 1455(014525, 016520, 914164, 514165), 14559 (015927), 1475a(u), 1622a(e14429, u), 17599(e15925, M), 1791 (015926, u). Unconfirmed reports: INGHAM‘QQ. C. F. Wheeler and E. F. Smith (1991). KALAMAZOO 99. e. R. and F. N. Hanes (1947). Excluded Species Paspalum laeve Miehx. The report of this species for Van Buren Co. by W. J. Beal (1904) is based on the misidenti- ficaticn of a specimen of E, pubescens. Paspalgm setaceum Michx._ The reports for this species from Wayne Co. by w. J. Beal (1904), 0. A. Farwell (1901) and e. F. Wheeler and E. F. Smith (1991) are based on mie- identifieations of specimens of 2. pubescens. 43. 8. PANICUM L. Sp. P1. 55. 1753. A very large genus, including about 500 species, of the tropics, subtrOpics and warmer parts of the temperate regions. Nearly 200 species occur in North America, of which at least 43 species are found in Michigan. Key to the Michigan Species l. Basal leaves distinctly different from those of the culm, forming a winter rosette, or the blades elongate (Sub- genus DICANTHELIUM) 8. Blades elongate, no winter rosette formed '3. Blades not more than 5 mm. wide; branching from the base or the lower nodes (Section DEPAUPERATA) 4. Spikelets about 3.5 mm. long, beaked OOOOOOOOOOOOOOOOOOOOOO. 10 20W 4. Spikelets 5.2 mm. long or less, not beaked 5. Gulms single or few in a tuft; spikelets turgid, 2.7 to 3.2 mm. long 8. a. W 5. Oulms in large tufts; spikelets not turgid, .3.3 to 2.7 mm. long 6. Sheaths pilose; spikelets 2.8 to 3.7 mm. long, pilose 3. 2,. W 6. Sheaths glabrous; spikelets 3.3 to 2.3 mm. long, glabrous or sparingly piloae ......OOOOOOOOCOCCCOOO 4. 2.m 3. Blades 5 to 9 mm. wide; branching from middle or upper nodee (Section BIOKNELLIANA) on. species 00.... 0.0 0.0. O .00 O. .000 5. £0 pigmelli; 2. Blades not elongate, basal leaves forming a winter rosette 7. Spikelets turgid, blunt, strongly nerved (Section OLIGOSANTHIA) 44 8. Panicle narrow, the branches erect 9. Blades glabrous on both surfaces . 7. E. W 8. Panicle about as wide as long, the branches spreading 10. Spikelets narrowly obovate, 3.5 to 4 mm. long; plants appressed-pubesoent .. 8. _11. W 10. Spikelets broadly obcvate, 3.2 to 3.3 mm. long; pubescence, where present, not appressed .................. 9. 23‘3ggipgggyymug 7. Spikelets not turgid, blunt, or strongly nerved ll. Ligule of conspicuous hairs, usually 3 to 5 mm. long ' 13. Sheaths glabrous, or only the lowermost somewhat pubescent (Section SPRETA) 13. Panicle narrow, one-fourth to one-third as wide as long 10. L m 13. Panicle open, two-thirds as wide as long, or more . 11. 2. W 13. Sheaths strongly pubescent (Section LANUGINOSA) l4. Spikelets not more than 2 mm. long 15. Oulms conspicuously pilose with long, hori- zontally spreading hairs; spikelets 1.8 to 1.9 mm. long ............ 13..£, pzaegogigg 15. Oulms variously pubescent, if pilose the hairs not long and horizontally spreading 16. Vernal blades glabrous or nearly so on the upper surface .... 13.,2, tennegsgeggg 16. Vernal blades pubescent on the upper sur- face, sometimes pilose near the base and margins only , 17. Spikelets 1.3 to 1.5 mm. long 45 18. Autumnal phase widely decumbent- spreading, forming a mat ............. l4.‘£, albemazlegse 18. Autumnal phase erect or leaning, never forming a mat 19. Axis of panicle pilose, branches tangled, the lower drooping ......... 15. 2, implicatum l9. Axis of panicle puberulent only, the branches not tangled, the lower ascending .. 16. 2, megigionalg 17. Spikelets 1.6 to 2 mm. long 20. Upper surface of blades pilose; spike- lets 1.8 to 2 mm. long; autumnal phase decumbent- spreading ......... l7.‘£, subvillosum 20. Upper surface of blades appressed- pubeseent or pilose toward base only; spikelets 1.6 to 1.8 mm. long; autumnal phase not decumbent- spreading ......... 18. 2, hyaghggag 14. Spikelets 2.2 mm. long or more 21. Pubescenee on culms horizontally spreading; autumnal phase freely branching .......... 19. P. villosissigug 21. Pubescence on culms appressed or ascending; autumnal phase sparingl branching 20. E. W 11. Ligule obsolete or nearly so ‘ 22. Spikelets nearly spherical at maturity (Section SPHAEROCARPA) One species .............. 21. E, sphaerggagpon 22. Spikelets usually obovate or elliptic 23. Blades oordate; spikelets 2.5 mm. long or longer 46 24. Spikelets 2.5 to 3 mm. long; sheaths glabrous or minutely puberulent (Section COMMUTATA) 25. Culms crisp-puberulent; spikelets about 2.5 mm. long . ..... ......... 22. 2, ashei 25. Oulms glabrous or softly puberulent; spikelets 2.7 to 3.2 mm. long .................. 23. 2, goggutatum 24. Spikelets 2.7 to 5 mm. long, if less than 3 mm. long then sheaths hispid, otherwise sheaths glabrous or softly villous (Section LATIFOLIA) 26. Sheaths strongly papillose-hispid; spike- lets 2.7 to 3 mm. long 24. 2. W 26. Sheaths glabrous or softly villous; spikelets 3.4 mm. long or longer 27. Nodes glabrous; spikelets 3.4 to 3.7 mm. long 0.000.000... 35. ROM—om 27. Nodes bearded; spikelets 4 to 4.5 mm. long OOOOOOOOOOOOOOOOOOO 26. 20mm 23. Blades not oordate; spikelets less than 2.5 mm. long 28. Sheaths crisp- or a pressedppubescent (Section COLUMBIANA 29. Spikelets 2 to 2.9 mm. long, elliptic 30. Spikelets 2.8 to 2.9 mm. long ......... ........ . 27.,2. deamii 30. Spikelets 2 to 2.4 mm. long 31. Spikelets 2.2 to 2.4 mm. long; panicle open, the branches spreading . . . . . . . 28. 2. ggmmons 19mm 31. Spikelets 2 to 2.1 mm. long; panicle dense, the branches ascending .......... 29. 2, addisonii 47 29. Spikelets not more than 1.9 mm. long, obovate 32. Spikelets 1.8 to 1.9 mm. long 30. 2. W 32. Spikelets 1.5 to 1.6 mm. long ...OOOOOOOOOOO 31. £0 gglumpiwgm 28. Sheaths glabrous or ciliate only in the autumnal phase (Section DICHOTOMA) 33. Nodes, at least the lower, bearded 34. Spikelets 1.5 to 1.6 mm. long, glabrous (occasionally pubescent) ......... 32.,2.‘m;g;ggg;pgp 34. Spikelets 2 mm. long or more 35. Spikelets glabrous 36. Autumnal phase erect; primary blades rarely more than 5 mm. wide ............. 33.,2. ggghgtggng 36. Autumnal phase topheavy, reclining; primary blades 6 to 10 mm. wide ............. 34. 2. W 35. Spikelets pubescent ... 35.,2. bggealg 33. Nodes not bearded 37. Spikelets pubescent 38. Oulms erect, never becoming vinelike .............. 35. 2, pggealg 38. Culms soon prostrate, vinelike, the branches divaricate ........... 36. 2, lggignm 37. Spikelets glabrous 39. Oulms soon prostrate .. 36. £,,;gg;ggg 39. Oulms erect, or the autumnal phase tepheavy, never prostrate 48 40. Autumnal phase erect; primary blades rarely more than 5 mm. wide; second glume shorter than fruit and sterile lemma ............ 33. E, gighoteggm 40. Autumnal phase topheavy-reclining; primary blades 6 to 10 mm. wide; second glume equalling fruit and sterile lemma .... 34. 2. bagpulatum l. Basal leaves similar to the culm leaves, not forming a winter rosette and the blades not elongate (Subgenus EUPANICUH) 41. Panicle much-branched, diffuse; spikelets mostly long-pedicellate, not secund on the branches 42. Sheaths papillose-hispid; weedy annuals (Section CAPILLARIA) 43. Panicles dr00ping; spikelets 4.5 to 5 mm. ‘ long ....... ...... ............ 37. 2, miliggggm 43. Panicle erect; spikelets not more than 4 mm. long 44. Panicles more than half the height of the entire plant 45. Panicles narrow, usually less than half as bread as long ........ ...... 38.,2, flexilg 45. Panicles as broad as long .. 39. 2, ggpillgze 44. Panicles not more than one-third the entire height of plant .......... 40. g, philadelphiggg 42. Sheaths not papillose-hispid, mostly glabrous 46. First glume short, one-fourth to one-third as long as the spikelet, truncate or broadly triangular; plants annual, lacking rhizomes (Section DICHOTOMIFLORA) One species 41. E. W 46. First glume aouminate, at least half the length of the spikelet; plants rhizomatous perennials (Section VIRGATA) One species 42. 2. Elm 49 41. Panicle with few, nearly simple primary branches; spikelets short-pedicellate, appressed and secund along the branches; plants perennial; sheaths flattened (Section AGROSTOIDEA) 0116 Species 00.000.000.000 eeeeeee so 43. £0 §S£0§§01Q6§ 1. Panicum depguperatum Muhl. Descr. Gram. 112. 1817. Panicum strictum Pursh, F1. Amer. Sept. 1: 69. 1814; not of R. Br. (1810). Panicum.de u eratum var. psilophyllum Fern. Rhodora 23: 152. 1921. Panicum strictum var. silo h llum (Fern.) Farwell, icE. Icad. Sci. ep. 26: 5. 1941. Open sterile woods and sand blowouts. Map no. 15. Specimens examined: ALLEGAN‘QQ. EAB 2670(8123999); LAK(w). ‘gpgpgg pg. 990 2079(914629). BERRIEN‘QQ. 09(u, w). ‘ggss‘gg. er(914602). CHEBOYGAN.QQ. 00D 29601(u); Jar 15264(u), 1966(u); FOG 49(914654); HHI 2942(016575); up 45(u). pg; 5 pg. rep 5072(u). DICKINSON‘QQ. rap 5069 (u). ,gggggngg. nu 9060(011796, u). KALANAZOO'QQ. LAK(IA 5 sheets). KALKASKA‘QQ. WJB 19(914615). ,gggg.gg. ewe 2956(012119), 2954(012152), 4595(011077), 5559(012114); EJC (u, 914569). KEWEENAW‘QQ. our 11559(014021), 12459(e14401); rJH 9096(u); FEW 5596(u). ;§;g_Ro1§1e. GAB 5614(u), 5676 (u). .gggg pg. ewe 6959(012106). ggygnesrou g9. OAF 5950 (u). 'pgggugg, Ru 9540(u). HACKINAC‘QQ, rHu 1616(8124378), 1617(9124579). ‘ggggg§.gg. DCo 291(914492). HARQUETTE‘QQ. urs(09179); CKD 450(0912, u). MECOSTA.QQ. 990 5002(u); es? 1092(9). NINOHINEE'QQ. eoe 2975(u). MISSAUKEE‘QQ. 50 B&D(8124001). MONTCALM g9. eAD(u); GNP 965(9). uUSKEGON ‘99. wJB(914650).. NEWAYGO QQ. ews 5042(012116, 012117), 5411(012115), 5415(012121), 5479(012120): THM 1605(9124575). OAKLAND.QQ. MTB(0913); OAF 5994(014592), 6504(014591, u), 6959(014521, 016525, u). ONTONAGONIQQ. HTD(Sl4484, 914495, 814632). Igsggpg_gg. wJB 19(Sl4614). Qggggg,gg, ewe 717 (9122479). PRE§QUE‘l§§§'QQ. JHE 7015(u); rHu 647(9124559, 9124541). SQHOOLCRAFT‘QQ. euR 7219(9). ‘sg, 99515.99. 0KD 252(955551), e.n.(u, 915492); 049 4970(014016, u), 5499 (014015, u); BAl(Sl4589). TUSCOLA g9, 090(u). ygN_§g3§N 00. eHK(u). WASHTENAW‘QQ. CB(D219143, (u); 099 5950 (014022). unconfirmed reports: ALGER‘QQ. ISO file (1950). CHIPPEIAIQQ. 0. K. Dodge (1921c). MANISTEE.§Q. r. P. Dan- iels (1904a). 92, JOSEPH‘QQ. F. P. Daniels (1904b). 2. Panimum perlonggm Nash, Torr. Bot. Club Bul. 26: 575. 1899 . Panicum strictum var. erlon m (Nash) Farwell Amer. "“'lIdIT‘NE?T’ 11: 4ET"I§%%T ' Prairies and dry soil. Map no. 16. Specimens examined: ALLEGANIQQ. LAK(w). JACKSON 99. I&L(8146ll). KALAMAZOO 99, LAK(I42 sheets). KEWEENAWIQQ. OAF 755(014020), 940%(014025). LIVINGSTON QQ. JHE 5047(u); DuL(9125197). NENAreo g9, THM 1610(9124576). OAKLANDIQQ. our 5970(014552), 5997(014551). 'gg. gpg;§.gg. our 2210 51 (014051, u). ~NArNE_9_. OAF 755e(014050), 5619(u), 6157 (014529, u). Unconfirmed reports: BERRIEN 99. A. DeLisle (1951). HOUGHTON g9, use file (1950). WASHTENAI.QQ. 9. A. we1po1e (1924). 3. Panicum linearifolium Scribn. in Britt. and Br. Ill. Fl. 3: 500. 1698. Panicum strictum var. linearifolium (Scribn.) Farwell, mer. iidl. Nat. 11: 44. 1928. Dry woods. Map no. 1?. Specimens examined: ALLEGAN‘Q_. ewe 5512(9). CALHOUN .99. wJB(914567). eCHEBOYGAN.QQ. JHE 459(u), 1552(u), 1972 (u). gggggngg. 09(N-2 sheets). GRATIOT g9. 0AD(u, 914665). gggggg pg. wJ9(N, 961507); B&D 177(914610); 0AD(010556); 049 6540(014540, u); GHH(S14569). KALAMAZOO‘QQ. 199 1774(u). KEWEENAI‘QQ. OAF 597(014029). LAPEER 99. OAF 6652(014559, u); rHu 1669(9124599). IglglNGSTON‘QQ. DuL(9125196). uAeeus .99. CAP 5999(014019, u). OAKLAND‘QQ. 09(u, w); OAF 4999 (014026, u), 5996(014520), 6190(014559, u); Jus 106(u).' ROSCOMMON 99, 990 551(914609). SQBOOLCRAFT.QQ. RN 10962 (012764, u). 91. 229.18.29.- 09(u); BAw(914599). mpg. 09(0957); OAF 5619(014550), 6159(014024, u), 6159(014425, u), 12225§(u). Unconfirmed report: WASHTENAI‘QQ. B. A. lalpole (1924). 58 4. Panicum werneri Scribn. in Britt. and Br. 111. F1. 3: 501. 1898. Panigum strictum var. linearifolium subvar. werneri (ScEIEHTT‘Fsrwell, Amer. uidl. Nat. 11:'EZT"1929. Sterile woods and knolls. Map no. 18. Specimens examined: gpgggglgg. 9&0 1997(914596). CHEBOYGAN 99. JHE 1967(u). 'ggggg.gg. OAF 6562(014029). GRATIOT.QQ. ewe 6506(012104, S), 6507(012147, s), 6509 (011092, 9). ‘gggggg.gg. OAF 6562(u). KEWEENAW 99, (rep 5071(u). OAKLAND‘QQ. 09(0964, 0965); u19(0951). ‘§1.CLAIR 99. CA? 5497(014027). mmgg. 091cm). mpg. 09(0950); OAF 4530a(Cl4025), 45529(014555), 559ss(014555), 5601a(014534), 9072(014019, u), 9417(014017, u). Unconfirmed report: GENESEE Q9, 0. A. Farwell (1918). 5. Panicum bicknellii Nash, Torr. Bot. Club Bul. 24: 193. 1897; et in Britt. and Br. Ill. F1. 3: 497. 1898. Panicum bushii Nash, Torr. Bot. Club Bul. 26: 568. 1899. Panicum bicknellii var. bushii (Nash) Farwell, uich. ' read. 301. Pap. 1: 85. 1923. Dry sterile or rocky woods. Map no. 19. Specimens examined: '91. CLAIR QQ. OAF 5497(u). WAYNE 00. oAr 45509(u), 4552e(u). Unconfirmed reports: KALAMAZOO 99, C. R. and F. N. Hanes (1947). NASHTENAW.QQ. 9. A. welpole (1924). 53 6. Panim ber ii (Vasey) Scribn. U. S. Div. Agrost. Bul. . 8: , g. 3. 1897. Panicum sco rium var. leibergii Vasey, U. S. Div. Bot. 551. : 33. 1889. Prairies. Map no. 20. Specimens examined: KALAquoo 92. LHH 1769(u). ucN- ROE _e_c_)_. usu 5296(9). 91. CLAIR _0_g. CKD 154(914479). WASH- rENAw 99, OAF 7571(014005, u); 9Aw(el4102, 914596). 7. Panicum xantho h sum A. Gray, N. Amer. Cram. 8: Cyp. 1: no. 28. 1834. Sandy or gravelly soil. Map no. 21. Specimens examined: Mpg. CFW(Sl4649). B5192. GWB(S). .§§g§;§.gg. wJB(914502). CHEBOYGAN 99, FCG(Sl4633); JHE 449(u), 755(u), 961(u, 914592), 1525(u); Tau 595(9124020); up 42(u); CFI(N, 961517). ggggg‘gg, rHu 907(9124505). 9009910.gg. B&D 2719(914594). QEANQ TRAVERSE‘QQ. CF! (914674). GRATIOT‘QQ. 0AD(u). JACKSON‘QQ. run 1649 _(9124599), 1650(9124590). KEWEENAW‘QQ, OAF 764(014402); res 5596(u). iglgnfiglglg CAB 5625(u); JBu 2411(u). ‘pggg 99, wJB(914649). MARQUETTE‘QQ. urs(09177); exD(u). ‘gggggg ‘;§§§.gg. 0AD(u); 000 2940(u). MISSAUKEE‘QQ. B&D(8124006). IONTCALM.QQ. 0AD(010544, u); er(914522, 914655). uusxseow 99, ewe 6595(012151). ONTONAGON QQ, EAB(Sl4595, 814634). 9.1.3.4992} RM 9650(u). 91;. @3399. ext 246(914595), s.n. (use sheets). NASHTENAW.QQ. rHu 1665(3124396). 54 Unconfirmed reports: MANISTEE.QQ. w. J. Beal (1904), P. P. Daniels (1904a). ROSCOMMON QQ. use file (1950). 8. Panicum oligosanthes Schult. Mantissa 2: 256. 1824. Panicum ueiflorum E11. Bot. S. C. and Ca. 1: 120. 816; not of R. Br. (1810). Sandy, moist woods. Map no. 22. Specimens examined: CLINTON _eg. GWP 427(9). HILLSDALE 99. DH u256(s). g1. CLAIR gg. 09(w). _sg. JOSEPH 9g. D99 u95(s). 9. Panicum scribnerianum Nash, Torr. Bot. Club Bul. 22: 421. 1995'.” Panicum ma rocar on Torr. F1. North and Kid. U. S. 143. """"'_1925";Lno—Lrt of e0. (1919). Panicum scoggrium Wats. & Coult. ex Nash Torr. Bot. 1 3 lub . 2: 421 as synonym. 1895; not of Lam. (1799). ' “ Panicum oli osanthes var. scribnerianum (Nash) Fern. Rhodora 36: 85. 1934. Sandy soil or dry prairies. Map no. 23. Specimens examined: ALLEGAN 99. LAX"). m _gg. Dan u6(9). 365199. B&W(Sl4647). BERRIEN pg. HTD 1247 (914714). gs; _c_g. HSP 150(914659); eEw(961520). CLINTON gg. CM(Cl4086, 914644, 961519). M £9. OAF 4795a(u). 1911493. eEw(96l559). JACKSON _gg. SHC(Sl4645); 099 (014101); THM 1640(9124594): GNP 1542(9). KALAMAZOO 99. um). £91; _0_0_. ewD 2904(012150), 2946(012149), 5262 55 (012149), 5799(9120506). LIVINGSTON 99, DuL(9125194). uONROE 99. OAF 4951(014525, 016522), 5926(014546), 5927 (014545). HUSKEGON‘QQ. eDu(914642). OAKLAND 99, OAF 59694 (014597), 5051(014594, u); THM 1679(9124402). Qgggggngg. ewe 7915(012227). .91..ggg;9.gg. 09(0949); 0KD(u-2 sheets); OAF 5495(014545, u), 7416(014547, u). yggdgg§§§.gg. 09K(u); HSP(Sl4660). WASHTENAW‘QQ. 09(u); D&H u219(s); ENE 5297(u, 9121519); OAF 5259(014595), 5297(u), 5559(u), 5926(u); Tau 1651(9124592), 1660(9124594); 9Aw(914597). 13319.99. 09 (0947, u); OAF 1610(014599), 4527b(Cl4396), 4795a(014595), 4591(u), 6160(014544, u), 12250(u), 12251(u), 12251&(u);- eun 7266(9). Unconfirmed reports: HURON 99, Charitx‘gg. C. K. Dodge (1911). MABQUETTE‘99, A. Dachnowski (1907). TUSOOLA .99, 0. K. Dodge (1921d). 10. Panicum spretum Sohult, Mantissa 2: 248. 1824. Net, sandy soil. flap no. 24. Specimens examined: PRE§QUE ISLE 99, JHE 6161(u); LHH 665(u). 11. Panicum lindheimeri Nash, Torr. Bot. Club Bul. 24: 196. "“"‘19 . ‘ Panicum 1a inosum var. lindheimeri (Nash) Fern. odora 36: 77. 1934. Dry sandy or sterile woods and open ground. lap no. 25. 56 Specimens examined: ALPENA 99. ESP 5092(u). SERRIEN 0. EJH 97(u). CHEBOYGAN 99. JHE 7117(u). GRANp TRAVERSE 99. CFW(Sl4678, 914679). HURON 99. 0KD(u-5 sheets). JAeK- SON g_0_. THM 1649(9124590). KENT e_o. ewe 5607a(012107, 012156, 9). NONTuORENGT 99. HTD(S). MUSKEGON 99, em; (914552). 91. 0mm _09. 0KD(u). 1mm 99. OAF 9972(u). Unconfirmed reports: MACKINAC 99, Bois Blancugg. C. K. Dodge (1921a). TUSCOLA 99. e. K. Dodge (1921d). l2. Panicum raecooius Hitchc. and Chase, Rhodora 8: 206. 90 . Dry prairies and clearings. Map no. 26. Specimens examined: HERRIEN _09. em 199(u). BRANCH 00. van u95(s). GENESEE 99. D01 4012(915256). GRATIOT 00. . CAD(Sl4480). 949999 99. GWP 202(9), 212(9), 567(9). JAeKSON 99. GWP 704(9). KALAquoo 51), D&H u29(9); LHH 1765(u); LAK(w). KENEENAw _C_9. OAF 5964(014556). LIVINGSTON 99, 09(0959); DuL(S125195); Au(u). w 0_0. OAF 5991 (014450). uENouINEE 99. 000 51090:). MIDLAND _e_9_. RRD 5976 (014099). OAKLAND 99. uT9(0940, 0941); OAF 5462(014590). ONTONAGON 99. HTD(u). NASHTENAw 99. OAF 7979§(el4549), 799100. 151119 99. OAE 1596b(014557), 12225(u). Unconfirmed reports: CHEBOYGAN 99, F. 0. Gates and J. H. Ehlers (1925). OTTANA _e_0_. use file (1950). 91. 0mm 99. 0. A. Farwell (1919). 57 13. Panicum tennesseense Ashe, Elisha Mitchell Sci. Soc. our. 15: 52. 1898. Panicum lindheimeri var. geptentrionale Fern. Rhodora 23: 227. 1921. Panicum lindheimeri var. tennesseense (Ashe) Farwell, mer. “Idi. Nat. 11: 45. I538. Panicum lanugggosum var. fasciculatum (Torr.) Fern. odora 56: 77. pro parts. 1954. Panicum lanuginosum var. septentrionale (Fern.) Fern. Rhodora 36: 77. 1934. Open moist ground and edge of woods. Map no. 27. Specimens examined: ALCONA‘99. B&D 2169(814676). ALPENA 99. Ban 2079(914512), 2094(914515). SERRIEN 99. HTD 1367(314687), 1440(914696); EJH 96(u). CHARLEVOIX 99. m .13. u0R(0952). CHEBOYGAN 99, JHE 456(u), 962(u). 1499(u), 1526(u), 1527(u), 1555(u), 1924(u); HHI 2991(016569); uP(u). guy: 99, JHE 1755(u); Ru 10797(012952); Tan 1625 (9124592); erw(914692). 99919 TRAVERSE _eg. 0N9 9405(9), 2579(9). mg. W&L(Sl4475). 1990999. erw(9120140). KALAuAZOO _09, LAK(N). m 99. 0N9 2954(9). LIVINGSTON 99. JHE 5046(u). HAOKINAG 99. D&F 10592(A, 9125759), 13319 91911219. uTS(0955, 0954, 0955, 0956, 0957), 9999955. HTS (0951). uEeOSTA 99. RRD 4962(014099). OAKLAND _09. 06.9 (012649). _S_1;. 21.42.11 _qg. OAF 9059(014416, u). TUSOOLA 99. eKD(u). 1119mm. GNP 1710(9). NASHTENAN 99, 09 (0949, u); OAF 5257 (014417, u), 5847a(Cl4517, 016529, u); PJH 6959(914695). m 99. OAF 9972(014415). 58 14. Panicum albermarlense Ashe, Elisha Mitchell Sci. See. our. 16: 84. 1900. Panicum meridionale var. albermarlense (Ashe) Fern. odora 36: 76. 1934. Low sandy woods or open ground. Map no. 28. Specimen examined: PRESQUE ISLEI99. FJH 7016(u). Unconfirmed reports: CASS 99. 0. A. Farwell (1918). KALAquoo 99. 0. R. Hanes (1942), 0. R. and F. N. Hanes (1947). 15. Panicum implicatum Scribn. U. S. Div. Agrost. Bul. 11: 45, ..g 1999; et in Britt. and Br. 111us. F1. 5: 499, 1. 2929. 1999. Panicum lanu inosum var. implicatum (Scribn.) Fern. odora 36: 77. 1934. In a list of Division of Agrostology publications, Scribner (1901b) indicates that the date of publication of U. S. Div. Agrost. Bul. 11 is July 20, 1999. Although such an exact date is not available for volume 3 of Britton and Brown (1999), the preface is dated June 20, 1999. It is probably safe to assume that the latter publication was not printed and distributed before July 20 of that year. The place of first publication for this species is, then, in the Agrostology Bulletin cited above and as listed in Supplement 2 of the Index Kewensis. Wet meadows, bogs, sandy soil; in cedar and hemlock swamps. Hap no. 29. 59 Specimens examined: ALLEGAN 99. AJP(M). 999999.99. 0EN(914669). BERRIEN 99. HTD 1357(S14682). 9999 99. HSP 14(914699). CHEBOYGAN 99. JHE 5579(u), 5599(u), 5617(u), 5619(u), 6195(u); HHI 2848(016370). CLINTON _e_g. GNP 429(9). 9991:; 99. JHE 5695(u). HOUGHTON _e_0_. OAF 10269(015992), 11771(015991), 12957(015990). INGHAN 99. no 729(9); HTD (914691); GNP 201(9), 419(9). JACKSON 99. 090(914711). KALAMAZOO g_0_. LHH 1909(u). 19:31 99. em: 5505(012144). KENEENAN 99. OAF 597a(015999), 643a(Cl4512, 016514), 5976 (014515, 016515), s.n.(9120152); FJH 9199(u). Mg; 99. ONE 4904(012152, 012155). LENANEE 99. JTS 75(9), 99(9). 5999 99. R14 9524(u). MACOMB 99. OAF 5995(u), 5994(014597). uIDLAND 99. RRD 5979(014096). uISSAUKEE 99. HTD 711 (914699). 991999 99. um 5067(9). MUSKEGON _e_0_. ONE 5199 (012154). OAKLAND g), 02(N); OAF 2960(014421), 5270a 014425, u), 5994(u). 99991599,. 0N9 6575(012545). OTTANA 99. ONE 6070(012129). PRESQUE _I_9_I,_E_ 99. RN 924101), 9254 (u), 9629(u). 93;. 0241.13.92- 0KD(u-2 sheets, 9). mm 99. eHK(u). NASHTENAN 99. 0901); OAF 5275(014599, u), 5281(014599, u). m 99. OAF 1610£*(C14511, 016524), 4514c (014422, I), 12205(l), 12217§(M), s.n.(M). 16. Panicum meridionale Ashe, Elisha Mitchell Sci. Soc. OEET—_I5?—59. 1898. .Panicum lindheimeri var. implicatum subvar. meridionale she) Farwell, Amer. idl. at. 11: 45. 1928. Panicum lanu inosum var. i licatum subvar. m i ionale (Ishe arwell, Mich. cad. oi. Pap. 25(5): 5. 1941. 60 Sandy or sterile woods and clearings. Map no. 30. Specimens examined: ARENAe 99. OEN 555(914561). BAY l8 . 0917(914709, 914710). SERRIEN 99. 09(0955). eALHOUN O _9. NJB(914669). OHIPPENA 99. Drummond 99. RM 9121(u). HOUGHTON 99. OAF 12046(015990). 99999 99. CKD(M). JAeKSON 99. 090(914711); OAF 5954(u); GNP 752(9). KALAquco 99. HTD(9124000); LHH 1771(u); LAK(w-2 sheets). @519 e_O. 0N9 5549(012125, 9124002). KENEENAN _09. OAF 6429.9. (015997). 9959 99. ONE 6697(012122), 6969(9124005). 99VINGSTON 9;. DuL(9125199). MIDLAND 99. RRD 5999(014100). 999999 99. OAF 6995(015992, u). NUSKEGON 99. 0N9 5967(9), 6954 ' (012599), 6769(012126), 6912(012125); NJ9(914709). OAKLAND 99. uT9(0952, 0954, e950); OAF 5951(015994), 5029(014551), 5616a(015995). 913919 90. ONE 5079(9), 6555(012124). 9_. 99999 99. OAF 57994(015996). NASHTENAN 99. OAF 5945 (015991); LKL 965(u); HAN(914595).- Unconfirmed reports: 9999'99. 0. A. Farwell (1918). eHEBOVGAN 99. F. 0. Gates and J. H. Ehlers (1925). ORANPORD 99. A. DeLisle (1951). 9919999. I. 0. Gates and J. H. Ehlers (1925). 17. Panicum subvillosum Ashe, Elisha Mitchell Sci. Soc. Jour. 18: 86. 1900. Dry woods and sandy ground. Map no. 31. 61 Specimens examined: 91.3999 99. B&D 1868(814511). ARENAe 99. em 555(914705). BRANQLI 99. Dell! u95(s). 999- BOYGAN 99. TM 400(9124015). HOUGHTON 99. CAP 9777(014419). menu _09. W&H(Sl4543). 90999 99. 0EN(9120159). JACKSON 99. TH): 1645(9124597), 1647(912499). KALKASKA 99. NJS (914557). KENEENAN 99. CA? 642(014414, 914559), 1214 (014419, 914670); FJH 9095(u). 9A_K_E_ 99. ONE 7524(9120205). 9_I__LINGSTON 99. CAP 5947(u); THu 1594(9124575). MACKINAC _09. THu 1619(9124591). MARQUETTE 99. uT9(99179); AD(u). uEeOSTA 99. GNP 1091(9). uIDLAND 99. RRD 4922(014097). uONTeALu 99. 0AD(010512, u). OAKLAND 99. 09(u); OAF 5510 (u), 5991(u). ONTONAGON 99. HTD(S14691). ROSCOMMON 99. DiA 129(H, 9). SCHOOLCRAFT 99. eKD(u). 99. 9919999. eKD (M);_0AF 22104(014415), 5496(u), 9059(014514). 999mg. LHH 1792(u). NASHTENAN 99. OAF 5947(014420). 9.4199 99. OAF 4512b(M), 9075(u); erw(n). Unconfirmed reports: CHIPPEWA 99. C. K. Dodge (19210). MACOMB 99. O. A. Farwell (1927). 18. Panicum huachucae Ashe, Elisha Mitchell Sci. Soc. Jour. 153 SI. 1898. Pani dichotomum var. fasciculatum Torr. F1. North 9 1d. U. 3. 146. 1824. Panicum nitidum var. pilosum Torr. Fl. North 8: Mid. U. S. 146. 1824. Panicum dichotomum f. fasciculatum late. 8: Coult. in . Gray. En. ed. 6. 633. 1890. 63 Panicum yuachucae var. fasciculatum (Torr.) Hubb. odmma I4: 171. 912. Panicum lindheimeri var. fasciculatum subvar. ilosum orr.) Farwell, Amer. Midl. Nat. 11: 45. I8 8. Panicum lanu inosum var. fasciculatum (Torr.) Fern. Rhodora 36: 77. 1934. Panicum lanu inosum var. fasciculatum subvar. pilosum orr.) Farwell, MicE. lead. 801. Pap. 26: 5. 1941. Prairies and open ground. Map no. 32. Specimens examined: ALLEGAN 99. 0N9 5044(012129, 012151); AJP 5(914694). 991 99. 0179(9); RRD 5494(014095). SERRIEN 99. em 1990:); EJH 91(u), 9999 99. HSP 14(914592), 952(914554). 9§EBOYGAN 99. JHE 54601), 152901), 207704), 6195(u); euR 7002(9). 991.9999. 000 910901). 9999999. JHE 2641(u), 2642(u). gENESEE 9_. Del 5595(914556). 9999- 999 99. BdtD 559501). 99999999. 099(914541); 0EN(914526, 914527, 961557). JACKSON 99. CAP 5941(u); GNP 1454(9). KALAMAZOQ 99. LAK(N). 9913999. 0N9 56(9122259), 2955 (012127), 6110(9). KENEENAN fl. OAF 597o(014596), 12516 (015769, 914555). LIVINGSTON 99. DuL(9125201, 9125202, 9125205). uAGKINAe 99. Mackinac 99. ONE 6697(011079). MACOMB 99. DCo(Sl4547); OAF 5999(014009); ERL(SI4551). uANISTEE 99. OAF 5209(u). uAR09ETTE 99. CKD(M). MENOMINEE 99. 000 2677(M), 2997(9), 2947(9). MISSAUKEE 99. B&D (9124007). 999999 99. 09(u); OAF 6240(015999, u); RRD 6215(014094). uONTOALu 99. 0EN(914510, 914556). uUSKEGON 65 ‘99, 0Du(914675). NENATGO 99, 0N2 5411(012150); RM 9955(u). OAKLAND 99. 09(0926, u); uTB(0924, 0925, 0927, e959); OAF 5995(014516, 016529), 5592(u), 5616a(u), 5955(u). 999999 .99. DAP(914552). SCHOOLCRAFT 99. JHE 155(u), 4275(u). 99, ‘99999 99. 0KD(u, 914564); OAF 2929(015999), 4971(014014, u), 5496(014015), 9057(015997). 99,'999999 99. CFW(Sl4544). NASHTENAN 99. 09(u, w); J’D(M); COE 1699(u); Earl: 5204(u); OAF 5941(015994); EJH 6960(u), 6960(914695). 99199.99, CB (0925, u); OAF 643b(Cl3979, 914556), 1592(015977, 015979), 4512b(Cl3976, u), 4515a(u), 4527a(015996, u), 12217§(09649, 09650, 09651, 09652, 09655, 09654, 09655, 09656, 09660),-s.n. (09670, 09672). ‘ Unconfirmed report: HILLSDALE 99. 1480 file (1950). 19. Panicum villmmssi m Nash, Torr. Bot. Chub Bul. 23: 49. 18 6. Dry sandy or sterile soil; Open woods and hillsides. Map no. 33. Specimens examined: ALLEGAN‘99. EAB(9124OOS). MISSAU- .999 99. 290(9124009). MONTCALM‘99, GNP 465(9). 999999 99. eEN(914540, 914665). MUSKEGON.99. 0Du(914529). 999,99999 99. LAK(N). Uncenfirmed reports: EMMET.99, F. 0. Gates and J. H. Ehlers(1925). KALANAZOO 99, e. R. and F. N. Hanes (1947). 64 20. Panicum seudo bescens Nash, Torr. Bot. Club Bul. 26: 57V. 1899. Panicum villosissimum var. pgeudgpubescens (Nash) Fern. odora 36: 79. 1934. . Panicum euchlamzdeum Shinners, Amer. Midl. Nat. 38: 170. I§44. Panigum commonsianum var. euchlamfgeum (Shinners) Pohl, mar. midi. Nat. 38: 50 . 4 . Sandy open woods. Map no. 34. Specimens examined: '95999 TRAVERSE 99. 0Fw(s14705). IARQUETTE‘QQ. LHS(012145). MUSKEGON‘QQ. wJB(9147O4). NEwAIOO.9_. THM 1600(6124574), 1612(6124577). ‘999999.99. owe 4726(015549). .99199 99. 047 9075(014541).- Unconfirmed report: SAGINAW‘QQ. O. A. Farwell (1918). 31. Pani um s haerocar on E11. Bot. S. C. and Ga. 1: 125. IBIS. Panicum microcarpon var. sphaerocarpon (311.) Vasey, U. S. D. A. Spec. Rep. 63: 12. 1883. The name Panicum microcargon var. sphaerocarpon has been credited by various Michigan authors'to Beal, who published the combination in his 'Grasses of North America' (1896); the Vasey combination, however, is obviously earlier. Sandy soil. Map no. 35. Specimens examined: BERRIEN‘QQ. HTD 1377(814514), 1769(614599; EJH 89(M). JACKSON.QQ, 630(614662); 020(1, 314609); GHH(814525, 814652); Tau 1659(9124565), 1641 65 (9124595); GNP 1550(9). 9991949 99. 90c(961522). NUSKEGON 99. CDM(Sl4650, 914651). NEWAYGO 99. HTD 997(914599). OAKLAND 99. 09(0946, I); OAF 2127e(014409), 5594(014599). 199 99999 _09. 99? 161(914655), 900(914607). NASHTENAN 99. 1'91: 1666(9124597). 99999 99. OAF 1599(014522, 016525, 914656), 12229(u), 12255§(u). Unconfirmed reports: BAY.QQ. N. J. Beal (1904). 0A99 .99. 0. A. Farwell (1919). KALAMAZOOIQQ. c. R. and F. N. Hanee (1947). .99. CLAIR 99, w. J. Beal (1904). 23. Panicum ashei Pears. Elisha Mitchell Sci. Soc. Jour. - 5"“: 55. 1999. Panicum umbrosum Leo. ex Torr. in Eaton, Man. Bet. 342. ‘ 1818; not of Beta. (1786). Panicum commitatum var. ashei (Pears.) Fern. Rhodora 363 E}. 1534. Dry, rocky woOds. Map no. 36. Specimens examined: OTTAWA 99. ONE 1549(9). IAYNE 99. 0A9 6596§(01445O). Unconfirmed reports: BERRIEN _C_Q. A. DeLisle (1951). uLANAzoo 99. c. R. and F. N. Hanes (1947). NUSKEGON _09. O. A. Farwell (1919). 33. Panicum commutatum Schult. Mantissa 2: 348. 1824. Panicum nervosum Muhl. ex E11. Bot. S. C. and Ga. : T1 2."T9"16; not of Lam. (1797). 66 Woods and OOpses. Map no. 3?. Specimens examined: ALLEGAN 99. GWP 1697(9). INOHAN 99. GFN(914671). KALAMAZOO 99. LAK(N). KENT 99. 949 (914571). LAPEER 99. mm 1676(9124401). Unconfirmed reports: 91;. CLAIR 99. w. J. B991 (1904). NAYNE _09. O. A. Farwell (1901, 1919). 24. Panicum clandestinum L. Sp. P1. 58. 1753. Moist sandy ground. Map no. 38. Specimens examined: ALLEGAN 99. one 4565(011076). ‘ 99199. GWB(S). 'BERRIEN _09. 09(0905, N, 914590); HTD 1297 (914492). 9999 99. NJB(914672); FCG 1519(14); HSP 149 (914464). 0009910 99. B&D 2752(11, 914491). HILLSDALE 99. GNP 954(9). 91591999 99. GWP 412(9); 0mm); 909(914572). KALANAZOO 99. LAK(w-2 sheets). 91999 99. wow). NAOKINAO 99. 99999 _I_e_. ms(c909). MUSICEGON 99. 0014(914495, 914505). OAKLAND 99. MTB(C906, 0909, 0910, 0911, 014524); 0A1" 5914 (014524, 016521). 999999 99. one 1564(0122471). SHIAWASSEE 99. D01 5025(961511). 99. 99999 99. 0KD(N-5 sheets); OAF 5999(014440), 4011(014445), 725101). 999 99999 99. LHH 1794 (11); MP 1711(9). 19199 99. OAK 9167(014444,-u). Unconfirmed reports: CLINTON 99, l. J. Beal (1904), 0. F. Wheeler and E. F. Smith (1991). EATON 99. H. L. Clark (1902). GENESEE 99. w. J. Beal (1904), 0. F. Wheeler and 67 E. F. Smith (1991). 11.40099 Q. N. J. Beal (1904), 0. F. Wheeler and E. F. Smith (1991). 99. JOSEPH 99. F. P. Daniels (1904b). NASHTENAw 99. '9. A. Walpole (1924). 25. Panicum latifolium L. Sp. P1. 58. 1753. Panicum macrocarpcn LeC. ex Torr. in Eaton, Man. Bot. ed. 3. 34 . 1818. Rocky and sandy woods. Map no. 39. Specimens examined: ALLEGAN 99. CWB 3045(011081, 012141). 99991. GWB(S). 99999 99. GWP 1644(9). CALHOUN 99. IJB(Sl4623). 9999 99. GWP 1577(9); HSP 172(914605)- , CHEBOYGAN 99. JHE 2220(9). GENESEE 99. Dow). GRATIOT 99. 0AD(010479, N, 914624). 999999, 0KD(n). 99999999. NJB (914516, 961529); 90(9); GWP 550(9), 1529(9); W&H(Sl4619). JACKSON 99. GNP 750(9), 1527(9), 1412(9), 1465(9); 11901). KALANAzoo 99. LHH 1761(M); 119(9). 999999. ONE 429 (9122479), 5516(012142); EJC(Sl4618); GDS(M). 9.999 99. RN 99070:). LENAWEE 99. JTB 71(9). LIVINGSTON 99. JHE 1900 (u); DuL(9125195). MACOMB 9;. D0c(961525). NEOOS'rA 99. GNP 1054(9). NUSKEGON 99. NJB(SI4622). NENAIGO 99. ms 1016(914620), 1047(914517). OAKLAND 99. 09(11, I); wrs (0924); 999 1615(N); OAP 5921(014005), 4256(014002, u). 5594h(014000, it); JNS 117(9). OSGODA 99. DAP 21(914616). ROSCOMMON 99. EAB 594(914519); 9&0 555(914621). 9'9. 0_LA_I_9 99. 0KD(M-5 sheets). 99. 999999 99. GNP 1555(9), 2495(9). 99999999 99. L9P(N). WASHTENAW 99. mm); 009 2295(9); 69 . 999(9); FJH 6870(M, 914617); CDL(M); AJP 155(M); BAS(914595); ARW 3267(M); 999(9); 99(9). 99999 99, A(S14625); 09(0929); OAF 1579(014004, 995751), 1920(014529, 016519), 45525 (014001, N), 6161(M), 1222O(M), s.n.(N). Unconfirmed reports: BERRIEN 99. A. DeLis1e (1951). Eumrr 99. 9. 0. Gates and J. H. Ehlers (1925). 26. Panicum boscii Poir. in Lam. Encycl. Sup. 4: 282. 1816. Panicum latifolium var. molle Vasey ex Ward, Fl. lash- ington 135. 1881. Panicum porterianum Nash, Torr. Bot. Club Bul. 22: 420. 895. . Panicum boscii var. molle (Vasey) Hitchc. and Chase, odora 10: 64. 1908. Woods. Map no. 40. Specimen examined: JACKSON 99, GWP 689(8). Unconfirmed reports: BERRIEN’99, A. DeLis1e (1951). 9999 99. 9. J. Cole (1901). OAKLAND 92, 0. A. Farwell (1919). 99, 99999 99. 0. 92 Dodge (1900). 0. A. Farwell (1919). TUSCOLA‘QQ, 0. K. Dodge (19214). WASHTENAW.QQ. s. A. Walpole (1924). 99999 99. 0. A. Farwell (1919). 27. Panicum deamii Hitchc. and Chase in Deam, Ind. Dept. onserv. Pub. 82: 284. 1929. Panicumegilccxianum of Fern. (1950), but not of Easey Sand dunes and sandy woodlands. Nap no. 41. 69 Specimen examined: OCEANA _09_. 099 4794(9). 88. Panicum commonsianum Ashe, Elisha Mitchell Sci. See. our. 15: 55. 1898. Sand dunes and sandy woods. Map no. 42. Specimens examined: KENT 09. 099 4595(9). 9999100 99. Dan 9274(9). 89. Panicum addisonii Nash, Torr. Bot. Club Bul. 25: 83. IB§§. Panicum commonsianum var. addisonii (Nash) Fern. odora 37: 391. 1935. Open, sandy ground. Map no. 43. Specimens examined: LIVINGSTON 99. IJC(M); DML (9125199). 30. Panicum tau etorum Nash, Torr. Bot. Club Bul. 25: 86. 18§8. Panicum columbianum of Fern. (1950), but not of Scribn. Sandy woods. Map no. 44. Specimens examined: ALEEEA'QQ, B&D 2091(814967). 51332359 99. 09001-2 sheets). 99; 99. 099(9-2 sheets); 990 4915(014097): 099(914519, 914520, 914699, 914700). 9999199 .22- CFW(Sl4677). 099901019.gg. JHE 2065(9), 4672(9), 5299(9); 900 12386(A), 13053(A); 991 2947(016567): 199 571 (9124019). 910919909 09, CFW(Sl4556). (Egggg'gg. JHE 2110 70 (9); LHH 695(9): 199 719(9124542). moo. 019(914701); 090(9). 911191200 90. 03.7 94(9124004): 1.99 1754(9), 1770 (9). 999199. 099 2999(012145), 4592(011094). 1.1299992. 199 1674(9124400). 9900911 _Cfl. 990 5001(014099). 90910191 92. 099(914509). 90999009 99. 009(914529, 914694). 9991100 09. 099(914509). OAKLAND .92; 09(9); 019 5510(015995), 5582 (014006), 5595(014515, 016516); 199 1679(9124405), 1690 (9124404). 909009909 _0_0. 919(9). 90900909191 90. .199 4269(9). 91. g_L_1_I_9 92. 090 151(914699), s.n.(u-s sheets, 914696). 1719919917: _0_9. 199 1656(9124595). 11399 _0_9_. 011v 1674b(9), 9972(09702). 31. Panicum columbianum Scrin. U. S. Div. Agrost. 7: 78, . EQ. 1897. Sandy woods and Open ground. Map no. 45. Specimens examined: DELTAIQQ. F&P 3080(M). HURON go, 019(9). 919191500 90. 1.99 1796(9). 091091009 00. 919 (914690). 1719919919 _0_0. AJ‘P 592(9). 11199 00. OAF 1219§ (I). Unconfirmed report: .filo CLAIR 99. C. K. Dodge (1900). 32. Panicum.microoar on luhl. ex E11. Bot. S. C. and Ga. I: 12 . 16. let woods and swampy places. flap no 46. Specimens examined: 1109909 09. 199 1644(9124596). 71 171199 0. 019 54009<014595). Unconfirmed reports: OAKLAND g9, M. T. Bingham (1945). 719 90999 99. w. J. 9ea1 (1909). ‘ 33. Panicumlgiohotomum L. Sp. P1. 58. 1753. Panicum dichotomum f. commune Wats. & Coult. in A. Gray, n. ed. 6. 6330 i890. Panicum.déchotomum f. racile Wats. & Coult. in A. Gray n. ed. 6. 155. 51990"". ' Dry sterile woods. Map no. 4?. Specimens examined: CALHOUN _qg. WJB(Sl4565). 9199 99. 900 1591(9); 099 1594(9). w _0_9. 09(9). M £9. IJB(Sl4867); 099(9). JACKSON 99. 099(914491); 0779 744(9); 99(9). K1L191200_0_q. 1.99 1762(9); 1.111(9). 5913399. AJP (9). 999999117 _0_0_. 019(914506). W 92. D00 65(914476). 'w 09. 099(914559, 914557). 90999009 g9. 009(914560, 914562, 914565). OAKLAND 93. 919(0916, 0919); 019 2107 (014454), 4999(014455, 9), 5595(014459), 9429(014451, 9). 911111 99. 099 1954(9122475), 1574(9122475), 1594(012140). 93;. mg. 090(9-2 sheets, 914559). 911;. mpg. cw? 1524(9), 1547(9), 2494(9). _v_1_15_ 99991 _09. 999 166(915165), s.n.(914675). 9199199111 _qg. 019 5256(014459); 999(9); HM). mpg. 09(0917); 019 645(914507), 4275(9), 4555s (9), 5596(014424). Unconfirmed reports: BERRIEN‘QQ. A. DeLisle (1951), 72 0. 1. Farwell (1919). mg. H. 'r. Darlington (1900). Charitzh. 0. K. Dodge (1911). 91919119992. 9. P. Daniels (1904s). 34. Panicum barbuletum Michx. F1. Bor. Amer. 1: 49. 1803. Panicum dichotomum var. barbulatum (Michx.) Wood, ass-book ed. 3. Sterile or rocky woods. Map no. 48. Specimens examined: 91909.99. 019 6559(014452, H). 919 99999.99. 900 1451(9). Unconfirmed reports: INGRAM 99. O. A. Farwell (1918). _9_'r_. 01.119 _0_0. 0. 1. Farwell (1919). 9119900. 0. 1. Far- 9e11(1981). 35. Panicum boreale Nash, Torr. Bot. Club Bul. 23: 421. 1895. Panicum boreale var. michiganensg Farwell, Rhodora :‘3‘56. 1940. Hoist open ground or woods. Map no. 49. Specimens examined: CHARLEVOIX.QQ. 919(9124005). 099901019.gg. J99 962(914591). .95199 99179999.gg. 099 (914690). 0919109'99. 010(992 sheets). 190919‘99. 099 (914716, 914717). 99999919‘09. 019 645(014429), 11555 (014427), s.n.(961529); 919 9055(9); 999 5596(914712). 91091910‘99. 909 10595(1). 999091999 99. 000 2957(9). MIDLAND 99, 990 4926s(c14092). 90999009 99, 9JB(914551); 75 099(914715). 99911100 99. 099 5571(012155). 0191.199 00. 09(0922); 019 5050(014426, 9). 909001991911 30. 93.9 5079(9). 93. 01.119 09. 099(9). Unconfirmed reports: BAY 99. C. K. Dodge (19219). 0009910 09. 9. T. Darlington (1921). 1119191200 _c_:_0_. 0. 9. and 9. 9. Hanes (1947). 9991.99. 9. J. Beal (1904), 9. J. 0c1e (1901), 0. 9. Wheeler and 9. 9. Smith (1991). 36. Panicum lucidum Ashe, Elisha Mitchell Sci. Soc. Jour. 15: 17. 1898. Net woods and sphagnum swamps. Map no. 50. Specimens examined: ‘§I. CLAIR‘QQ. CKD(M+3 sheets). 37. Panicum miliaceum L. Sp. P1. 58. 1753. Broom-corn Millet. Waste places; introduced or escaped from cultivation. Map no. 51. Specimens examined: 099901019.g_. JHE 5545(9). g919101.gg. 019(9, 914661). 0009910 99. HTD(314604). JAQK§ON.Q_. 099 1244(9). '9991.gg. 909(914550). 99999919 ,0_. 019 1414s(014009). 91091919 _09. mmg. 999 (0956). 019L199.gg. 09(0955); 019 7599(014007, 9). [9199; 29911.09. 919(914594), .11199.QQ. 019 1414(914594, 914605). Unconfirmed reports: $910011 00,. 9s0 file (1950). 91909 529. 990 file (1950). 931:. 91.119 _g_. 0. K. Dodge (1921s). 74 38. Panicum flexile (Gatt.) Scribn. in Kearney, Torr. Bot. lub 551. 20: 476. 1893. Panicum ca illare var. flexile Gatt. Tenn. F1. 94. 1887. Sandy, mostly damp, soil; meadows and open woods. Map no. 52 . Specimens examined: ‘19093'99. 019 7215(9). Iggggpg- my; 99. mg. 909 991(0920). 9999199. 089 10577 (1, 9125757). .190919‘99. 099(914505, 961516). 1109909.gg. 099(9). .9991.gg. 9J0(9, 914629). 119999.99. 099(9). 1191909109.gg. 199 4719(9). 999091999'99. 000 2961(9). 0191199 99. 019 995(015769), 7215(014455); 099(9). ‘919919- 919.99. 919 6427(9), 6996(914555), 9291(9219144, 9), s.n. (1, 9);LxL 1557(9). .ggzggigg. 019 995a(015767). 12195(9). Unconfirmed reports: KALAMAZOO'QQ. C. R. and F. N. Hanes (1947). _S_’§. 01.119 _gg. 9. .1. Beal (1904), 0. K. Dodge (1900), 0. 9. Wheeler and 9. 9. Smith (1991). 39. Panicum capillare L. Sp. P1. 58. 1753. Panicum capillare var. occidentale Rydb. U. 8. Nat. erb. ontr. 3: 186. 1895. Witch-grass. Open ground and waste places; a weed in cultivated ground. Map no. 53. Specimens examined: .911.gg. 099(9). 9999199.;9. 09(9, 912954). 9919L99015.gg. Beave; 1g. 909(0902). 75 0999011019 _qg. J99 1220(9), 1629(9), 5697(9); 199 965 (9124015); 99 95(9). 9999193. JHE 199(9). 0009910 92. mm 2599(9, 914579). 90009109 09. 019 10526(014447); 9.19 1529(9). 190919 93. 9.19 17(914497), s.n.(9, 914575); 90 710(9); 911(9); 199 965(9124015); 0119 519(9). 1119939. 919 1220(914590). 911191500 92. 119(9). 91191991 09. 19 61(9, 9). 91393 99. 099 4150(012159, 015554); 099(9). 99999919 _0_9_. 900 10422(1); 019 16(914577), 5145(014445), 556(014529, 016517). 1.19999. 9911 1527(9124419). 119999 g9. 199 1671 (9124559). 19911910 g), 099 6525(011095, 012159). 1991999 539. .919 54(9). 1191909109 99. 99.1.(9125191). 9109191000. 909 105951(1), 105959(1), 105950(1); 799 1619(9124590). 2933 9113913. 919(0905). 910099 _0_0. DCo(Sl4496); 991 (914504). 9190119119 00. MTB(09176). 999091999 92. 000 2502(9), 2599(9). 919910999 00. JCE(S). 909909 £0. 999 5149(9). 99999009 09. 0995945(012157). 0191199 99. 09(9); 919(0900, 0901, 0904). 90900109191 go. 909 10409(1, 9125761). 10467(1, 9125760), 10468(A). 91;. 3111929. 099(9). 119 91199929. 999 559(914591). 919919919 09. 90o(9); 9.19 9149 (9); 1.19 154(9); 199 1661(9124595). 91199 00. 019 556a (014446). 5600(9); p19 240(9), 254(9). Unconfirmed reports: £13919 go. 990 file (1950). 0119099 92. 990 file (1950). 09199991 99. 0. 9. Dodge (1921c). 01191-09 _0_9. 990 file (1950). 0999999 30. 990 file (1950). 911199119 09. 990 file (1950). 9099909. 76 9. 1. Dar11ngton (1900), Charity £5. 0. 9. Dodge (1911). 91091910 go. Mackinac 13. 0. 9. Dodge (191:3). 9191199 09. MSC 1119 (1950)1 '§E. JO8EPH‘QQ. F. P. Daniels (1904b). 1090011 92. 0. 9. Dodge (1921d). 11eo seen, but not 001-- looted by the author in 9911919999 £0. 1n the winter of 1951. 40. Panicum philadelphicum Bernh. ex Trin. Gram Pan. 216. . I826. Dry open or sandy ground. Map no. 54. Specimens examined: 1091102. 099(9). 90910119 _0_0. 099(961512). 91999 00. 019 3214b(014549). Unconfirmed reports: OAKLIND.§Q. MSG file (1950). 911191z00 _gg. 0. 9. and 9. 9. Hanes (1947). 41. Panicum dichotomiflorum Miohx. Fl. Bor. Amer. l: 48. 1863. Panicum roliferum var.7%eniou1atum lood, Amer. Bot. & or. . . 18 . Panicum Eroliferum of Michigan authors, but not of Lam. Panicum dichotomiflorum var. genioulatum (Wood) Fern. oaora 38! 387. 1936. Fall Panicum. Moist ground, along streams; a weed in waste places and cultivated 9011. Map no. 55. Specimens examined: 90009109 g_0_. 019 12247(014441). 190919 _0_9. 199 972(9124422); 099(9). 911191z00 0_0. 119(9) 1191909109 93. DML(8123200). 909909 99. 999 5669(9). 77 0191199 _0_9. 019 6416(014442). _91. 01119 go. 099 726(0915), s.n.(9). s_1. JOSEPH Q. FPD(Sl4627). 919919919 go. 909 10559(1). 91999 _09. 09(0914, 9, 9); 019 4912(014457), 11697 (014456, 9219415); 9119 242(9). ' Unconfirmed report: BERRIEN 99. A. DeLisle (1951). 43. Panicum virgatum L. Sp. P1. 59. 1753. Panicum vir atum var. cubense Griseb. Cat. P1. Cub. Switch-grass. Prairies, open ground and open woods. Map no. 56. Specimens examined: 1119019 _0_9. 199 1921(9); 09? 1156 (9). 199910 09. 099 551(914657). 91109. 099(9). 9999199 93. 09(9); 919 1447(914477); 099(9); 091D 1715(9). w _gg. 9&9 997(9). 019939. 999 9125(9); 09? 1569(9). £99- wgq. 919(0961, 0965); JHE 1276(9), 2200(9), 5071(9); 9&9 1276(914579). 910919909 09. 099(914641). 911199119 99. D99 9254(9). 90009109 _gg. 019 11119(014519). 190919 29. 98.9 9192(9); 999(914572); 09? 401(9). .1109909 _gg. 099 15 (914640). 911191500 g9. 9&9 9159(9), 9250(9); 99(9). £93 539. 099 6797(012105); 9J0(914524); 999(914525, 914575). 11999910. 019 6697(9). 1991999 99. 09(0900, 9). 1191909- 19909. 019 1929(014520, 016526); 991(9125192). £918.91: _09. 011‘ 5500(9); 099 7504(9). 90999009 0_0. 099(914659). 919- 1999 _09. 019 5909(014409). 011191 02. .099 6205(012100). 9911919999 09. 099 2655(9). _92. £1,143 99. 099 247(914597), 79 s.n.(9, 919497); 019 2199§(014410), 9055(014519, 016927). 919 99999 99, DAP(Sl4639); 999 971(914576). 919919919 09. 09(9); 019 6929(014412, 9), 6924(9), 6940(M), 6803(M), 6803§ (014411), 9021(9); 900(9); FJH 9199(9); 191 1094(9); 919(9). 91199‘99. 019 9949(9). Unconfirmed reports: 191919‘99. 990 file (1950). 01199 99. 990 file (1950). 0999999 99, 9. J. Beal (1904). 09199 19199999199. 990 file (1950). Igggggigg. Charitz.£g. 9. 1. Darlington (1900), 0. 9. Dodge (1911). 9101919 99. 990 file (1950). .91. JOSEPH 09. 9. J. Beal (1904), 9. P. Daniels (19045), 990 file (1950). 9999099 99, 990 file. (1950). Also seen, but not collected, by the author in 1999099‘09. 43. Panicum aggostoides Spreng. P1. Pugill. 3: 4. 1815. Wet meadows and shores. Map no. 57. Specimens examined: 1119019 go. 099 9109(011991). 9999199 gg. 919 1560(914500), 9629(914691). ‘190919‘09. 09? 407(9). 919099.09. DCo(S61513). (giggggigg. 099 5079 (012159, 9). Excluded Species Panicum amarum E11. Reported for St. Joseph 00. in the MSC file (1950). No specimens were seen and it is of doubt- ful occurrence in Michigan; it is an Atlantic coast species. 79 Panicum anceps Michx. Reported for Tuscola Co. in the MSC file (1950). No specimens were seen. It may possibly occur in Michigan since it is known from the states adjoining on the south, or this report may be based on a misidentifiea— tion of a specimen of.§. agrostoideg. Panicum annulum Ashe. Reported for Michigan by Hitch- cock and Chase (1951), but no specimens have been seen. Panicum calliphyllum Ashe. Reported for Kalamazoo Co. by C. R. Hanes (1939) and C. R. and F. N. Hanes (1947), and without definite locality by C. W. Bazuin (1947). No speci- mens were seen, but it may well occur in the state since it is reported also by Hitchcock and Chase (1951). Panicum columbianum Scribn. Reported for Michigan by Hitchcock and Chase (1951), but no specimens have been seen. Panicum condensum Nash. Reported for Berrien Co. in the MSC file (1950). N0 specimens were seen and it is of doubtful occurrence inasmuch as it is an Atlantic and Gulf coast species. Panicum'gattingeri Nash. According to the range as given by Fernald (1950), this species would be expected in Michigan, but no specimens have been seen. It is not report— ed for the state by Hitchcock and Chase (1951). Panicum lanuginosum Ell. Reported for Van Buren Co. by 9. J. Beal (1909) and for Wayne Co. by 0. 1. Farwell (1901). No specimens were seen and it is not likely to occur since the species has a more southern and eastern distribution. 80 Panicum laxiflorum Lam. Reported by 9. J. Beal (1909) on the basis of a report, without specimen, from H. S. Pepoon. No specimens were seen and, since this is a species of the southeastern states, it probably does not occur here. Panicum nitidum Lam. The several reports for this southeastern coastal species probably are based on misiden- tifications of specimens of E, dighgtggum, E, lindheimeri or E, tsugetorum. Panicum polyanthes Schult. Reported for Macomb Co. by 9. J. Beal (1904) and 0. 1. Farwell (1901), and also for Oakland Co. by Farwell (1901). The Oakland 0o. specimen. to which Farwell refers is a specimen of E, sphaerogarpgn. The species has a more southern range. Panicum proliferum Lam. This is an Old World species to which 2. dichotomiflorum has been referred by various authors. I Panicum ravenelii Scribn. & Merr. The report for Washtenaw Co. by B. A. Walpole (1924) was based on a misiden- tification of a specimen oflg. leibergii. ’ Panicum scoEarioides Ashe. Reported for Michigan by Hitchcock and Chase (1951), but no specimens have been seen. Panicum scoparium Lam. This species has a more southern distribution and no Michigan specimens were seen. Reports by several authors, under the synonymous name 2, pgbescens Lam., are based on misidentifications of specimens of 2, huachucae and E, implicatum. 81 Panicum tuckermanii Fern. Reported for Michigan by Hitchcock and Chase (1951), but no specimens have been seen. Panicum verrucosum Muhl. Reported for Michigan by c. w. Bazuin (1947) and by Hitchcock and Chase (1951), but no specimens have been seen. Panicum xalapensis H.B.K. Reported for Michigan by Hitchcock and Chase (1951), but no specimens have been seen. Panicum zgdkinense Ashe. Reported for St. Clair 00., under the synonymous name'g. maculatum, by W. J. Beal (1904) and C. K. Dodge (1900). No specimens have been seen, but it may well occur in the state since it is also reported for Michigan by Hitchcock and Chase (1951). 82 TRIBE ANDROPOGONEAE Key to the Michigan Genera 1. Racemes of several to many joints, solitary digitate, or aggregate in panicles .... ...... .... 9. ngrgpogog 1. Essence reduced to one or a few Joints, these mostly peduncled in a subsimple or a compound panicle 3. Pedicellate spikelets staminate ....... 10. Sorghum 3. Pedicellate spikelets absent, the pedicels only present .. ........ .. ..... ...... ll. Sorghastrum 9. ANDROPOGON L. Sp. P1. 1045. 1753. A genus of about 150 species in the tropics of both hemispheres, a few of which extend into the temperate regions. Three of the latter species are found in Michigan. Key to the Michigan Species 1. Racemes solitary on each peduncle ... 1. A, gggpaxing 1. Racemes 2 to numerous on each peduncle 2. Pedicellate spikelet staminate; inflorescence of digitate spicate racemes ........... 3. A, gerargii 2. Pedicellate spikelet reduced to 1 or 2 glumes; inflorescence paniculate ........... 3. A, virginigng 1. Androp9g0n scoparius Michx. F1. Bor. Amer. l: 57. 1803. Schizach ium sceparium (Michx.) Nash in Small, Fl. outheast. U. S. 59. 1903. 83 Andre o on Eraematurus Fern. Rhodora- 42: 413, pl. s26. O --§e 19400 Little Bluestem. Prairies, open woods, dry hills and fields. Map no. 58. Specimens examined: ‘é§g§§.gg. CKD 400(0659), s.n.(l); JHE 442301). .wgg. GWP 1121(3). BERRIEN _0_0. Gum); HTD 1411(815103). CALHOUN go. WJB(815287). CHEBOYGAN £0. won 10873(A), 10374(A); JHE 1185(M, 815269), 1238(M); mar 1258(312567). CLINTON _qg. GWP 425(3). CRAWFORD £0. JHE 442301). Mpg. MTB(0661); JHE 2158(11); THM 818(8124304). GOGEBIC g9. B&D 8774(M, 315292). N varasrhgg. CRB 3060(1); cws 8789(8). wgg. NJB(361545); Des M194(S); ow? 416(8). _I_qsggio. GAL 4204(4). JACKSON 93. 08.0 (315286); THM 1656(3124361); GWP 796(3). KALKASKA 99. LR 67(H, 8124722). £111 99. cws 5191(012011); 1101(1)). jig 99. OG(M); RM 9805(M). W132- OAF 6687(M); ram 1675 (8124362). LENAWEE _e_g. we 5(S15290), s.n.(3123059); cs (11, w). LIVINGSTON go. 0411 M198(S); DML(8133216). mg- Ngg Q. wen 10394“), 10399(A); JHE 183500; cor 771m; ran 1623(8124363). p933 Elena g. MTB(0663). 391.1113 15. nrs(0662. Mpg. 00o(315294). MANISTEE 93. FPD (815266, 315289); OAF 3045a(M), 305.5%(11), MECOSTA g9. GWP 1059(3), 1074(8). MENOMINEE 9g. 00c:r 2888(M). NEWAYGO _e_g. D&H M273(8). OAKLAND _cg. won 10561(A); OAF' 5587c(M), 5610(M), 56104-01). wgg. RM 9670(M). mm; 84 _gg. JHE 5448(N), 709701); RM 11059(C12725, M). ROSCOMMON £0. DiA 176(H, 3124720). _e_T. CLAIR 93. CKD(M). _3_'_r_. JOSEPH _gg. D&H u114(s). VAN BUREN _Cg. HSP 562(315295). WASHTENAW _C_g. ECA(N); MHC(M); AJP 145m), s.n.(M-Z sheets); GBS(M). Unconfirmed reports: CHIPPEWA go. 0.1:. Dodge(1921c). HURON £9. Charityfi. C. K. Dodge (1911). KALAMAZOOEQ. C. R. and F. N. Hanes (1947), MSC file (1950). MARQUETTE _0_0. C. K. Dodge (1918). MONTMORENCY _e_0_. C. K. Dodge (1921a). OGENAN 39. C. K. Dodge (1921a). OSCODA _02. C. K. Dodge (19215). OTTAWA _02. C. K. Dodge (1921a). WAYNE _0_0. MSG £116 (1950). ‘ 2. AndrOpOgon gerardii Vitm. Summa P1. 6: 16. 1793. Andropggon rovincialis Lam. Encycl. l: 376. 1785; net of Hetz. (I783) AndrOpOgon furoatus Muhl. in Willd. Sp. P1. 4: 919. Big Bluestem. Dry soil, prairies and open woods. Map no. 59. Specimens examined: ALLEGAN £9. CHK(M). M29. GNP 1122(3). £5339. GWB(S). BERRIEN _C_0_. HTD 1410 (315271); Dds M151(S). CALHOUN _C_q. wJB(315285). _gAsg g9. Dan m20(s). CHEBOYGAN _0_0. JHE 127501). 565901); E41: 1275 (315268). CLINTON 99. DMB(S); GNP 257(3). CRAwPORD _0_0. EAB(8123041); JHE 5941(11). HILLSDALE _Cg. D&H U245(s). HOUGHTON 99. CDR 265101, 14). HURON go. ELM A227(N). P’VV‘ 85 INGHANgg. WJB(815264, 361542); D&H M180(S), M183(S); WAM 88(3); GwP 596(3). $15.99 go. GAL 4202(A). JACKSON 99. D&H M226(S); xax(n); THM 1652(3124365); GWP 723(3), 797(3). KALAHAZOOCQ. Dds 1145(3), M137(S)3 “((3). mpg. CWB 1886(8121830), 5925(D219412); 733(315275). KEWEENAW.QQ. VGD 10456(A). 1.53.99. CD(M); RM 9805(M). LAPEER C_0. THM 1677(3124564). LENAWEEIQQ. WJB 6(815272); CB(C651, w); JTB 5(3).’ LIVINGSTON 99. D&H n197(3); JHE 4721(N); DHL(3125214, 3125215). MACOMBIQQ. DCo 65(315284), 65(361539). MECOSTA .99. EAB 824(315275); GwP 1057(3), 1081(3). MENOMINEEugg. COG 8861(M), 3581(M). MUSKEGON.QQ. CNB 4197(010260); CDM (3125040). NEWAYGO‘QQ. 3A3 1037(315274); D&H N273(s); Ru 3824(u). OAKLAND 99. CB(0650); MTB(CBSZ, 0655, 0654, 0655. 0658); 043(014437); MTH(016737). PRESQUE‘E§£§.QQ. JHE 5443 (u), 7098(M); RM 11022(N), 11070(C12724, n); THM 770(3124358). ROSOOMMOH‘QQ. DiA 120(3, 3124717). Igg._gggg§.gg. CKD(M, 315265, 315281). SHIAWASSEE.QQ. NHL(3). VAN BUREN‘QQ. HSP 550(315270). WASHTENAW‘QQ. ECA(N-2 sheets); JHE 1843 (M); 00E 844(M); OAF 1185(M); FJH 6971(315282); K&K(M); AJP 146(M), s.n.(Méz sheets); BAW(M). Unconfirmed reports: CHIPPEIA _CQ. 0. K. Dodge (19210). ‘ggggg‘gg. r. 0. Gates 4 J. H. Ehlers (1935). GOGEBIC 99. H. T. Darlington (1921). wgg. Charity _I_s_. H. '1‘. Dar- lington (1900), C. K. Dodge (1911)., MANISTEEIQQ. F. P. Daniels (1904a), MSG file (1950). MARQUETTE‘QQ. C. x. 86 Dodge (1918). MIDLAND 99. MSG file (1850). MISSAUKEE‘QQ. MSC file (1950). MONROE 99. M80 file (1950). MONTMORENCY ‘99. c. K. Dodge (1921a). OGEMAW‘QQ. C. K. Dodge (1921a). OSGODA 99. C. K. Dodge (1921a). ‘gg. JOSEPH 99. F. P. Daniels (1904b). TUSCOLA g9. C. K. Dodge (1921d). 3. AndrOpOgon virginicus L. Sp. P1. 1046. 1753. Broomsedge. Open ground, old fields, Open woods, sterile hills and sandy soil. Not common in Michigan. Map no. 60. Specimens examined: CASS 99. FCG 1511(M). OTTAWA 99. ONE 5083(012012). 5182(010855). VAN BUREN 99. HSP 556~ (315296). Excluded Species Andropogon_glomeratu3 (Walt.) B.S.P. Reported for Kalamazoo Co1 by C. R. and F. N. Hanes (1947) under the synonymous name Andropogpn virginicus var. abbreviatus Fern. & Grisc. No specimens of this species have been seen. It is doubtful if it occurs in Michigan since it has a much more southern distribution. Andropogon hallii Hack. Reported for Van Buren Co. by A. DeLisle (1951) under the synonymous name Andr0pogon chrysocomus Nash. No specimens have been seen for this species and it is of doubtful occurrence in Michigan since it has a more western distribution. 87 10. SORGHUM Moench. Meth. 207. 1794. A genus of about thirty species of the tropics, some of which are widely distributed in cultivation. Two species are lfound in Michigan. Key to the Michigan Species 1. Perennial, with long, creeping rootstocks; spikelets disarticulating from the pedicel at mmrity ... ..... 000.000.00.000... ...... O 1. g. Elegenflo 1. Annual; spikelets not disarticulating from the pedicel at mturity ......OOOCCO....O.... 2. g. Eulgale 1. Sorghum halepense (L.) Pers. Syn. P1. 1: 101. 1805.- Holcus halgpense L. Sp. P1. 1047. 1753. Andropgéon halepensis (L.) Brot. Fl. Lusitan. 1: 89. Johnson Grass. Open ground, fields and waste places. Not common in Michigan. Map no. 61. Specimens examined: BERRIEN.QQ. HTD 1372(310106). INGHAM.QQ. THM 856(3124421). .§HIAWASSEEJQQ. RRD 5448 (014226). WAYNEIQQ. OAF 1416a(013774), 8828(015773). Unconfirmed reports: EATON 99. N30 file (1950). KALAMAZOOIgQ. C. R. and F. N. Hanes (1947). TU§COLA.QQ. MSG file (1950). 2. Sorghum vulgare (L.) Pers. Syn. P1. 1: 101. 1805. Holcus sorghum L. Sp. P1. 1047. 1753. 88 Holcus saccharatus L. Sp. P1. 1047. 1753. Holcus durra Forsk. Fl. Aegypt. Arab. 174. 1775. Sor hum sor hum (L.) Karst. Deut. F1. 367 f, 189. “‘E‘IBSUT‘E“‘ ’ Sor hum vu are var. saccharatum (L.) Boerl. Ann. Jard. Bot. B§IEenzorg 8! 69. 1890. Holcus durra var. ae ticus (Koern.) Farwell, Mich. cad. 501. Rep. 30: 163. 1918. Holcus saccharatus var. technicus (Koern.) Farwell, ich. Acad. Sci. Rep. 20: 163. 1918. Sor hum vulgare var. technicus (Koern.) Jav. Magyar. Fl. I: 3. 34. Sor hum vul are var. durra (Forsk.) Hubb. and Rehd. Harvard us. Bot. Leaflets 1: 10. 1932. Sorghum. An occasional waif in Michigan. Map no. 63. Specimens examined: INGHAM.QQ. GWP 595(3). WAYNE _g. OAF 2504(013772). 11..§QRGHASTRUM Nash in Britton, Man. 71. 1901. A genus of six species in tropical Africa and three species in the United States east of the Rocky Mountains. One species in found in Michigan. 1. Sogghastggm nutans (L.) Nash in Small, F1. Southeast U. . 68. 1903. AndrOEOgon nutans L. Sp. P1. 1045. 1753. AngroBOgon avenaceus Michx. F1. Bor.-Amer. 1: 58. 1803. Sorghum nutans (L.) A. Gray, Man. 617. 1848. 89 ChrysopOgon avenaceus (Michx.) Benth. Linn. Soc. Jour. BO£0 19. :3. 18810 Sogghastrum avenaceum (Michx.) Nash in Britton, Man. 71. 1901. Indian grass. Prairies, open woods and dry slopes. Map no. 63. Specimens examined: ALLEQAN.QQ. GWP 1160(8). BERRIEN _gg. GLA(U); HTD 1509(315298); GWP 1787(3); 7(U). m _09. mm U261(s). QALHOUN 39. WJB(315302). _Q_A_§§_QQ. MS (U-2 sheets). QEEBQIQAN _QQ. UTB(01069); WGD 10575(A); JHE 1251(U, 315297), 2212(U). mpg. 0AD(315729). mm 10. wJ3(361641); W&H(815301); 7(315722). Wm. D&H U237(3); THU 1655(3124566). Km 10. ONE 20(3122257), 2165 (011158,.8122478), 2195(012015); 343(315299). mam. OAP 6690(015196, U). 1.111113511521139. DUL(3125217). m1- N_E_1_a:_ £9. COG 3836(M). MONTMORENCY g2. RU 11065(012672). NENATGO g9. CW8 2079(011157, 3122477); D&H M301(S); RU 9852 (011756). OAKLAND _gg. MTB(ClO71); 033(012952); OAF 1575 (015828), 5218(015185); GWP 1941(3). m @353 pg. HSP 548 (315504); MS(M). NASHTENAN _gg. ECA(U—-2 sheets); 03(01070, w); GBS(M). mg. OAF 1575a(015528). Uncenfirmed reports: .EQRQN‘QQ. Charity‘gg. 0. K. Dodge (1911). KALAUAZOO _gg. C. R. and r. N. Hanes (1947). UARQUETTE £9. LDachnowski (1907). 31. mpg. P. P. Daniels (1904b). TUSCOLA pg. 0. K. Dodge (1921d). 9O TRIBE TRIPSACEAE In much of the literature this tribe is referred to as the Maydeae, a name which is not in accordance with the cur- rent rules of botanical nomenclature. Key to the Michigan Genera l. Staminate and pistillate spikelets in separate portions of the same inflorescence, the pistillate below the staminate .................... 12. Iripgagum 1. Staminate and pistillate spikelets in separate inflores- cences, the former in a terminal panicle, the latter - in the axils of the leaves ....... ..... ...... 13. Egg 12. TRIPSACUM L. Syst. ed. 10. 1261. 1759. A genus of seven species, distributed from northern South America through the West Indies and Central America to central and eastern United States. One species occurs locally in Michigan. 1. Tripsacum dactyloides (L.) L. Syst. ed. 10. 1261. 1759. Coix dactyloides L. Sp. P1. 972. 1753. Eastern Gamagrass. Swales, banks of streams and other moist places. Map no. 64. Specimens examined: UACOUB g9. OAF 6297(M). NASHTE- NA 0. BAw(01089, 014225). 91 13. ZEA L. Sp. P1. 971. 1753. 1. Zea may. L. 3p. P1. 971. 1755. This common cultigen, the only species accepted in the genus, is found occasionally as a waif in Michigan. Although it is not a persistent part of the flora of the state, it is included here for the convenience of those who might encouns ter it in the field. 92 SUMMARY This floristio study of the Panicoideae of Michigan is the first to be made since 1904, when N. J. Beal's "Michigan Flora' was published. It involved the study of all Michigan specimens of this subfamily in the herbaria of Michigan State College, Cran- brook Institute of Science, the Division of Botany and Plant PatholOgy of the Canadian Department of Agriculture, Houghton Lake Wildlife Experiment Station, Michigan State Normal College, University of Michigan, University of Notre Dame, and Western Michigan College. Eleven genera, including 63 species, were found to occur definitely in Michigan. Keys to the identification of the genera and species are included in this report. A brief note regarding the habitat is given for each species. The coun- ties in which the specimens were collected are listed, along with information regarding the collectors, collector's number, present location of each specimen, and, where available, the herbarium numbers of the specimens. The nomenclature employed is essentially in accord with that of Hitchcock and Chase, 'Manual of the Grasses of the United States" (1951). A list of synonyms used by Michigan workers is included for each species where names other than the currently accepted one were used by them. 93 A few notes on the types of habitats are included in the beginning of the report. Maps showing distribution have been prepared for each species. An analysis of distri- bution patterns has been made. As a result of this analysis, the species have been divided into six groups. These are: species of statewide distribution; species of the southern half of the lower peninsula with scattered distribution in the upper peninsula; species of the southern half of the lower peninsula; species of restricted distribution or of rare occurrence; introduced weeds or waifs. These groups are individually discussed. . A summary, by counties, of the known distribution of the Panicoideae within Michigan is also included. 94 BIBLIOGRAPHY Allmendin er, E. C. 1876. Flora of Ann Arbor and vicinity. Ann rbor Sci. Assn. Proc. 1876: 85—-116. Bazuin, C. W. 1947. Check list of western Michigan lants. 47 pp. Privately issued by author (mimeOgraphedg, Grand Rapids, Mich. 1948. Interesting species of vascular plants col- Iected in western Michigan. Mich. Acad. Sci. Pap. 32: 3—-13. Beal W. J. 1896. Grasses of North America. vol. 2. 706 pp. (especially pp. 15--65, 78--168). Henry Holt and 00., New York. 1904. Michigan flora, a list of the fern and seed pIants growing without cultivation. Mich. Acad. Sci. Rep. 5: 1--147. 1908. Additions to the Michigan flora as published In the fifth report of the Michigan Academy of Science, 1904. Mich. Acad. Sci. Rep. 10: 85—-89. Agr. Ann. Rep. 50(1891): 47l--650. Bews, J. W. 1929. The world's grasses: their differentia- tion, distribution, economics, and ecology. x, 408 pp. Longmans, Green and Co., London. Billington, C. 1925. The flowering plants and ferns of War— ren Woods Berrien County, Michigan. Mich. Acad. Sci. Pap. 4(1): 81--110. ‘_ 1930. The flora of two acres of farm land in Oak- land County, Michigan. Mich. Acad. Sci. Pap. 11: 51-- 74. Bingham, M. T. 1938. A study of vegetational invasion and succession on a denuded area of the Cranbrook Estate, Bloomfield Hills, Michigan. Mich. Acad. Sci. Pap. 23: lCl—-108. and Wheeler, C. F. 1892. Michigan Flora. Mich. Bd. 95 1945. The flora of Oakland County, Michigan. ranbrook Inst. Sci. Bul. 22. 155 pp. The Cranbrook Press, Bloomfield Hills, Mich. - Britton, N. L. and Brown, A. 1898. Illustrated flora of the northern states and Canada. vol. 3. xiv, 588 pp. (es- pecially pp. 496—-501). Charles Scribners Sons, New ork. Chase, A. 1906. Notes on genera of Paniceae, 1. Biol. Soc. Wash. Proc. 19: l--10. 1908a. Notes on genera of Paniceae, II. Biol. oc. Wash. Proc. 21: l--10. 1908b. Notes on genera of Paniceae, III. Biol. 00. Wash. Proc. 21: 175—-188. 1911. Notes on genera of Paniceae, IV. Biol. Soc. Clark, H. L. 1902. Notes on the flora of Eaton County,' Michigan. Mich. Acad. Sci. Rep. 3: 51--52. Cole, E. J. 1901. Grand Rapids flora. A catalogue of the flowering plants and ferns growing without cultivation in the vicinity of Grand Rapids, Michigan. 160 pp. A. Van Dort, Grand Rapids, Mich. COOper, W. S. 1914. A cataIOgue of the flora of Isle Royals, Lake Superior. Mich. Acad. Sci. Rep. 16: 109--l3l. Cutler, H. C. and Anderson, E. 1941. A preliminary survey of the genus Tripsaggg. Mo. Bot. Gard. Ann.- 28: 249-- 269. Dachnowski, A. 19073. Flora of the Marquette triangle. Mich. Acad. 801. Rep. 9: 88--103. 1907b. Contribution to the botanical survey of the ron River valley. Mich. Acad. Sci. Rep. 9: 113--122. Daniels, F. P. 1904a. The flora of the vicinity oeranistee, Michigan. Mich. Acad. 801. Rep. 4: 125--l44. 1904b. ECOIOgy of the flora of Sturgis, Michigan. Mich. Acad. Sci. Rep. 4: l45--159. Darlington, H. T. 1900. Botanical notes on Huron County, Michigan. Mich. Geol. Surv. Ann. Rep. 7(8): 235-245. I . . O . O 0 a O O O I . a O o . . o I o . . s O .. I . e o o o n O c ' o o I . - ...7... o .9 I O I O s . . . . ' ~. 0 A . u I . s ' c O C . ' o 96 1921. Contributions to the flora of Gogebic County, Michigan, Part I. Mich. Acad. 801. Rep. 22(1): 147-- 1 6. 1923. Contributions to the flora of GOgebic County, Michigan. Part II. Mich. Acad. Sci. Pap. 1: 74--82. 1945. Taxonomic and eCOIOgical work on the higher p nts of Michigan. Mich. Agr. Expt. Stat. Tech. Bul. 201. 59 pp. Mich. St. Coll. Agr. Expt. Stat., East Lansing, Mich. Davis, 0. A. 1898. A contribution to the flora of Tuscola County, Michigan. Bot. Caz. 25: 453——458. 1908. The flora. In Hankineon, T. L. A biolOgical survey of Walnut Lake, Michigan. Mich. Geol. Surv. Ann. Rep. 1907: 217--231. Deam, C. C. 1929. Grasses of Indiana. 356 pp. Dept. Con- serv. Indianapolis, Ind. . 1940. Flora of Indiana. 1236 pp. Dept. Conserv. 'Div. For. Indianapolis, Ind. DeLisle, A. 1951. Personal communication containing list of forty specimens in the private herbarium of Rev. Peter Herbert, G. S. 0., at the University of Notre Dame. Dodge, 0. K. 1900. Flora of St. Clair County, Michigan. Mich. Hort. Soc. Ann. Rep. 29: 23l--341. 1911. Results of the Mershon Expedition to the rity Islands, Lake Huron. Mich. Acad. Sci. Rep. 13: 173-—190. 1913. The flowering plants, ferns and their allies o Mackinaw Island. Mich. Acad. Sci. Rep. 15: 2184-237. 1918. Observations on the flowering plants, ferns and fern allies growing wild in Marquette County, Michi- n, in 1916 and 1917, especially in the vicinity of the ron Mountain Club. Univ. Mich. Mus. 2001. Misc. Publ. 5. 43 pp. 19218. Observations on the flowerin plants, ferns and fern allies on or near the shore of Eake Huron from Linwood Park near Bay City, Bay County to Mackinaw City, Cheboygan County, including the vicinity of St. Ignace, s e O O o o a e u s 97 Mackinac and Bois Blane Islands, Mackinac County, Michigan. Mich. Geol. and Biol. Surv. Pub. 31 (Biol. Ser. 6): 15--74. 1921b. Observations on the flowering plants, ferns and fern allies growing wild in Schoolcraft County and vicinity in the upper peninsula of Michigan in 1915. Mich. Geol. and Biol. Surv. Pub. 31(Biol. Ser. 6): 75—- 124. 19210. Observations on the wild plants at White- fish Point, near the south shore of Lake Superior, and other parts of Chippewa Count , Michigan, in 1914. Mich. Geol. and Biol. Surv. Pub. 31 Biol. Ser. 6): 125--164. 1921d. Observations on the flowering plants, ferns and fern allies growing without cultivation in Tuscola County, Michigan. Mich. G801. and Biol. Surv. Pub. 31(Biol. Ser. 6): 165--222. Farwell, 0. A.. 1901. A catalogue of the flora of Detroit. Mich. Acad. Sci. Rep. 2: 31--68. 1913. Contributions to the botany of Michigan, no. 9. Mich.‘Acad. Sci. Rep. 15: 150--192. 1918. Notes on the Michigan flora. Mich. Acad. 01. Rep. 20: 161--l95. 1920. Notes on the Michigan flora, II. Mich. Acad. Sci. Rep. 21: 345--372. 1921. Notes on the Michigan flora, III. Mich. Icad. Sci. Rep. 22: 177-9185. 1923. Notes on the Michigan flora, IV. Mich. Acad. Sci. Pap.' 1: 85--100. 1927. Botanical gleanings in Michigan, IV. Amer. MIdl. Nat. 10: 199--219. 1938. Notes on the Michigan flora, VII. Mich. load. Sci. Pap. 23: 123--134. 1940. Contributions to the flora of Michigan, no. Mich. Acad. Sci. Pap. 42: 306--308. 1941. Notes on the Michigan flora, VIII. Mich. Acad. Sci. Pap. 26: 3--20. Fassett, N. C. 1951. Grasses of Wisconsin. 173 pp. Univ. of Wise. Press, Madison, Wise. 98 Fernald, M. L. 1943a. Why not AndrOpOgon gerardi? Rhodora 45: 255--258. 1943b. The common northern burgrass. Rhodora 45: 387--388. 1950. Gray's manual of botany. ed. 8. lxiv, 1632 pp. American Book Company, New York. Gates, F. C. 1912. The vegetation of the region in the vicinity of Douglas Lake, Cheboy an County, Michigan. 1937. Grasses in Kansas. Kane. St. Bd. A r. Rep. 55(1936, no. 220A). 349 pp. Kane. St. Print. lant, Topeka, Kane. and Ehlers, J. H. 1925. An annotated list of the higher plants of the region of Douglas Lake, Michigan. Mich. Acad. Sci. Pap. 4(1): 183--284. Haekel, E. 1889. AndTOpOgoneae. IQ DeCandolle, A. and De- Candolle, C. Monographiae Phaneregamarum. vol. 6. 716 pp. G. Masson, Paris. 1890. The true grasses. (Transl. by Lamson- cribner, F. and Southworth, E. A.). viii, 228 pp. Henry Holt and Co., New York. Hanes, C. R. 1939. Plants new or rare in Michigan records. Mich. Acad. Sci. Pap. 24: 3--7. 1940. Additions to the flora of Michigan, II. Mich. Acad. Sci. Pap. 25: 39-—42. 1942. The Atlantic coastal plain element in the fIOra of Kalamazoo County, Michigan. Mich. Acad. Sci. and Hanes, F. N. 1947. Flora of Kalamazoo County, Michigan. Vascular Plants. xii, 295 pp. Anthoensen Press, Portland, Me. Henrard, J. T. 1950. Monograph of the genus Digitgria. ‘xxi, 999 pp. Univ. of Leiden Press, Leiden. Hitchcock, A. S. 1908. Types of American grasses. U. 8. Mat. Herb. Contr. 12: 113--158. 1915. Poaeeae (pars). N. Amer. F1. 17: 198--288. 99 1920. The genera of grasses of the United States w th special reference to the economic species. U. S. Div. Agrost. Bul. 772. 307 pp. 1951. Poaeeae (pars). N. Amer. F1. 17: 289--554. 1935. Manual of the grasses of the United States. . S. D. A. Misc. Pub. 200. 1040 pp. and Chase, A. 1951. Manual of the grasses of the United States. U. S. D. A. Misc. Pub. 200. ed. 2. 1051 pp. Holt, W. P. 1909. 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Iron region. Sen. Doe. Spec. 8635. 32nd Cong. 3: 359--381. Winchell, N. H. 1861. Part III, Botany. Catalogue of the phaenOgamous and aerogenous plants found growing wild in the lower peninsula of Michigan and the islands at the head of Lake Huron. Geol. Surv. Mich. Bien. Rep. 1(1859--1860): 245-55O. Wright, J. 1839. Catalogue Of the phaenegamous and filieoid plants collected on the geological survey of Michigan. Legislative Rep. 23: 17--44. 102 APPENDIX: DISTRIBUTION MAPS Summary of Distribution by Counties (Map 1) Individual Species Distributions (Maps 2-—64) Map 1. Summary of Distribution by Counties 104 Isle Royals no. of Species 0 I - 9 I I0- l9 “IL/1,4? 20-29 4O Individual Species Distributions: Map 2. Map 3. Map 4. Map 5. Setaria lutescens (Weig.) Hubb. Setaria verticillata (L.) Beauv. Setaria viridig (L.) Beauv. Setaria italica (L.) Beauv. 106 ._.'_.—.'-j“: ' [assim—zf‘m ...... Individual Species Distributions: Map 6. Map 7. Map 8. Map 9. Cenchrus paueiflorus Benth. Echinochloa colonum (L.) Link. Echinochloa crusgalli (L.) Beauv. Echinochloa walteri (Pursh) Heller 108 Individual Species Distributions: Map 10. Digitaria filiformis (L.) Keel. Map 11. Digitaria isehaemum (Schreb.) Sehreb. Map 12. Diggtaria sanguinalis (L.) Scop. Map 13. Leptoloma cognatum (Schult.) Chase 110 ”"1 r1. ,_; 1,1»... J -. ! ....... ..... ....... —————— L... _’. ...:._.._A i .... . _L . ! ' ! I; 1335:3559 I 1 :2: !.:q:aitmyai. - —fmr—r_1._._r§ I ' ...... - . . A..._.—- . | I l . Individual Species Distributions: Map 14. Paspalum pubescens Muhl. Map 15. Panicum depauperatum Muhl. Map 16. Panicum perlongum Nash Map 17. Panicum linearifolium Scribn. 112 Individual Species Distributions: Map 18. Panicum werneri Scribn. Map 19. Panicum bieknellii Nash Map 20. Panicum leibergii (Vasey) Scribn. Map 21. Panicum xanthophysum A. Gray 114 1225; ..... - ----- I | I I-L._‘_.--1r-I—.T‘ ' . .ng'qL.._.T_£iT._r ' ! i ! ! Jew-.- Individual Species Distributions: Map 22. Map 23. Map 24. Map 25. Panicum oligosanthes Schult. Panicum scribnerianum Nash Panicum spretum Schult. Panicum lindheimeri Nash 116 Individual Species Distributions: Map 26. Panicum praecoeius Hitch. & Chase Map 27. Panicum tennesseense Ashe Map 28. Panicum albemarlenge Ashe Map 29. Panicum implicatum Scribn. 118 Individual Species Distributions: Map 30. Panicum mggidionale Ashe Map 31. Panicum subvillosum Ashe Map 32. Panicum huachucae Ashe Map 33. Panicum villosissimum Nash 120 Individual Species Distributions: Map 34. Map 35. Map 36. Map 37. Panicum pseudcpubescens Nash Panicum gphaerocarpon E11. Panicum ashei Pears. Panicum commutatum Schult. 122 ’ P‘ . H I i. r5 i P .J ' l '5 I“ ......j L. H. L I !- ' --—. l‘. ! ‘ .- ‘ ‘—' L i If I I- ! ..--5“”. I ‘ .i 1. !...... II. .- ~ 7";"1' . ‘ I" . I-—- ~‘ i ._l Fin?"— Inst-In it____ _J.1 _____ -‘ ‘\._\..J‘ Fig] filth—"L iLEEEJ'L_._ _‘ r‘L—IJ I ! "'\ A, r}-11_' ! I ‘ ‘ / ‘ l ‘ a ' ' I v ' | I l '6‘ lb. . _ . \ ‘ A‘ . \ ' * ._ e" s I l —'r:inln_im-'_[Jii lint-AT 4": i I I I - ~ .T._ __‘T:_._..i—._r-‘i- L- l i I I i-1__ -—.!._. - “I Em- ’’’’’ I m—F‘ 5: ! :i—n 1 ! i __Ia.I—.“'3;IL._. ~ ..... xi Fi‘rm—'_F-q‘ ! I."- .:.:.:.:.:.:, i .~'_ . L. . _I— C / / ”Pa ‘2: g 'I w- —1— II ‘1 Individual Species Distributions: Map 38. Map 39. Map 40. Map 41. Panicum elandestinum L. Panicum latifolium L. Panicum boscii Poir. Panicum deamii Hitchc. & Chase 124 Individual Species Distributions: Map 42. Panicum commonsianum Ashe Map 43. Panicum addisonii Nash Map 44. Pgnicum tsugetorum Nash Map 45. Panicum columbianum Scribn. 126 - -_:._._.,__ _ . l 4 --‘-,h--1w- nun-"‘I‘m‘“ an“; ”‘ Individual Species Distributions: Map 46. Map 47. Map 48. Map 49. Panicum microearpon Muhl. Panicum dichotomum L. Panicum barbulatum Michx. Panicum boreale Nash 128 -J . .l) (I. I. _“ ! i "m " I L J3“ ‘1‘ ' —.1'_ l M L I5 .l" .5 0 ~-_ I m ' II, ‘\ 9 Ia:- . -.......- -. --- . I )- ..._. . I- . ‘1- ' .—'- I ...... \ --.._,~ 1 ‘ ...._, I M! ' I'm '“ ' '1._ .\ l . I '1 . e }_ I ‘- —. ‘ -.\ f—-_. I .-- . ~-. '\ ' " '4 -""""I (m L..._._l_ l I ' /"~‘ A l i. 1.“ "hi im 1 _____ - I. . b r- - I V O - .A I \ “n. l I . {on 'A. \ i It ‘ I” ‘ lug I W .A‘ \\ I I l ' '0 e . ' ‘ 49‘ ‘ ' ’3'“ \ -' I ,0 J L?}_'Tiui?-"T:_— i ! I / I J I -.E ‘ 'ulflhmfa—l'a ‘ -1.-- i ! I ”I/ u..._ '—.23-:fo—-‘u_li;' " ! I i ‘ WM '— aim-.53" @483 ___!_ ! I I I ,un ;.=...r;..7..--..-.:.-..---a-= i I l | .L- .___,_4-. mfg-Tug“; 13;“ ' . _ l Individual Species Distributions: Map 50. Map 51. Map 52. Map 53. Panicum lucidum Ashe Panicum miliaceum L. Panicum flexile (Gatt.) Scribn. Panicum capillare L. 130 Individual Species Distributions: Map 54. Map 55. Map 56. Map 57. Panicum philadelphieum Bernh. Pangeum dichotomiflorum Michx. Panicum virgatum L. Panicum agrostoides Spreng. 132 Individual Species Distributions: Map 58. AndTOpOgon seoparius Michx. Map 59. Andrnggon gerardii Vitm. Map 60. Andr0p0gon virginicus L. Map 61. Sorghum halepense (L.) Pers. 134 . I 1 J .....' ..... I . “air; _I _r 15:-35:23:33 _ —.~- 4.435. ('.'.'.'.'::::I,m .u ~ .1 1'! I I - - , ....... ----- Individual Species Distributions: Map 62. Sorghum vulggre (L.) Pers. Map 63. Sorghastrum nutans (L.) Nash Map 64. Tripsaeum dactyloides (L.) L. 1 36 "I . -—l '— IT’I" LT]: - ;¥ " u‘ “III 11441141741 MI I