Setaria faberi Herrm.
Common Name: GIANT FOXTAIL
Coefficient of Conservatism: *
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Ad A-Grass

Setaria faberi B. S. Walters

Agricultural fields, roadsides, railway embankments, disturbed sunny sites. A recent invader from Asia first collected in Clinton Co. in 1965, spreading aggressively and a serious crop weed in many areas.

A tetraploid, this species is ordinarily more robust than S. viridis, which is diploid. The lemmas of S. viridis are sometimes spotted or mottled dark brown; those of S. faberi are unspotted. In its pubescent leaf blades and larger, somewhat exposed grains, this species might be thought to resemble S. pumila, but is readily distinguished by its ciliate sheath margins, less rugose fertile lemma, and smaller first glume. (The first glume in S. pumila is more than half as long as the second glume.)

Locations

Alger County
Allegan County
Berrien County
Branch County
Clinton County
Delta County
Dickinson County
Genesee County
Gogebic County
Hillsdale County
Kalamazoo County
Lenawee County
Monroe County
Newaygo County
Oscoda County
Ottawa County
Schoolcraft County
St. Clair County
Van Buren 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 15, 2017. http://michiganflora.net/species.aspx?id=2217.