Bromus hordeaceus L.
Synonym: Bromus mollis, Bromus molliformis
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad A-Grass

Bromus hordeaceus lemma B. S. Walters lemma

B. mollis of Michigan Flora.

Clearings, fields, lawns, roadsides, and disturbed places. Introduced from Europe and first collected in 1886 in Ingham Co.

Normally hairy on sheaths, blades, and culms, as well as spikelets. An occasional specimen with glabrate spikelets can be distinguished from B. racemosus by the short anthers. Almost all our plants are subsp. hordeaceus, but a single older collection from Washtenaw Co. (F. J. Hermann 6014 in 1934, MICH, WIS) is subsp. divaricatus (Bonnier & de Layens) Kerguélen (B. molliformis of Michigan Flora) with divaricate rather than straight awns; subsp. pseudothominii (P. M. Sm.) H. Scholz, with shorter glabrous lemmas has been found in southern Ontario, but not yet in Michigan.


Allegan County
Alpena County
Berrien County
Branch County
Cheboygan County
Clare County
Ingham County
Kalamazoo County
Mecosta County
Muskegon County
Newaygo County
Oakland County
Ottawa County
St. Clair County
Van Buren County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. November 29, 2022.