Pascopyrum smithii (Rydb.) Barkworth & D. R. Dewey
Synonym: Agropyron smithii
Coefficient of Conservatism: *
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Ad P-Grass

Pascopyrum smithii spikelets B. S. Walters spikelets

Agropyron smithii of Michigan Flora.

Adventive in dry soils along railroads, roadsides, on shores, etc.; closely resembling Elymus repens, but much less common, though collected as early as 1895 in Keweenaw Co. Native west of Michigan.

The glume differences often emphasized between Pascopyrum and the common Elymus repens are rather subtle and difficult to describe. In P. smithii, the glumes tend to start tapering from below the middle to a narrow or awned tip; in E. repens, they taper more abruptly from about or above the middle. Plants with slightly pubescent lemmas rarely occur. A few plants have broader and flatter leaf blades than usual (though still rather deeply grooved), possibly as a result of hybridization with E. repens.


Alger County
Cheboygan County
Chippewa County
Clare County
Emmet County
Houghton County
Kalamazoo County
Kent County
Keweenaw County
Menominee County
Muskegon County
Oakland County
St. Clair County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. June 25, 2022.