Diarrhena obovata (Gleason) Brandenburg
Common Name: BEAK GRASS
Synonym: Diarrhena americana
Coefficient of Conservatism: 9
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt P-Grass
Status: T

D. americana of Michigan Flora.

Very local: floodplain swamps, river banks.

The uppermost florets in each spikelet are sterile. The firm leathery lemma and palea are widely spread at maturity by the conspicuous, bilaterally symmetrical swollen fruit. Forms large patches with glossy foliage where abundant.


Allegan County
Barry County
Berrien County
Clinton County
Eaton County
Genesee County
Hillsdale County
Ingham County
Ionia County
Kalamazoo County
Kent County
Lenawee County
Midland County
Monroe County
Ottawa County
Shiawassee County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 26, 2020. https://michiganflora.net/species.aspx?id=2066.