Sporobolus compositus (Poir.) Merr.
Common Name: ROUGH DROPSEED
Synonym: Sporobolus asper
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad P-Grass

Sporobolus compositus A. A. Reznicek

S. asper of Michigan Flora.

Dry to moist fields, dry road and rail verges; native east and south of Michigan and presumably adventive here, where not collected until 1931, in Berrien and Wayne Cos. Now becoming abundant in the medians and along the shoulders of major highways. Even more than the common S. cryptandrus, the mature inflorescences remain within the sheaths, except for the very tip, but the enveloping sheaths do not bend into sickle-like form. Also the long filiform-involute leaves are very different from the flat, short blades of S. cryptandrus.

Locations

Berrien County
Branch County
Clare County
Genesee County
Gladwin County
Ingham County
Jackson County
Kalamazoo County
Lenawee County
Menominee County
Monroe County
Montmorency County
Washtenaw County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 18, 2017. http://michiganflora.net/species.aspx?id=2232.