Superintendent Bob Williams examines a mixed stand of bentgrass and annual bluegrass, under high moisture and temperatures, with the Poa annua going out, Beverly Country Club, Chicago, in 1955

Golf Course Superintendent Bob Williams stooping on a mixed stand of bentgrass and annual bluegrass at the Beverly Country Club, Chicago, in 1955. The Poa annua has died back while the Agrostis has not. Soil has been supersaturated with high temperatures.