Amaranthus powellii S. Watson
Common Name: TALL AMARANTH
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad A-Forb

Amaranthus powellii A. A. Reznicek

A native of western North America, occurring usually in disturbed ground, dumps, sandy fields, and roadsides.

Collected as early as 1917 by O. A. Farwell in Oakland Co., though reported by him (Farwell, 1919, 1927) as A. hybridus. The 1867 report in Michigan Flora, Vol. 2 and the Field Manual of Michigan Flora (from Washtenaw, not  Wayne Co.) has been re-determined as Amaranthus hybridus × A. powellii, though this still suggests the presence of A. powellii at that time. Despite these early reports, this plant has become common only in the last few decades. 

The rigid spiny bracts of this species give it a superficial resemblance closer to A. retroflexus than A. hypochondriacus.

Locations

Allegan County
Alpena County
Benzie County
Berrien County
Cass County
Cheboygan County
Crawford County
Dickinson County
Emmet County
Hillsdale County
Ingham County
Isabella County
Kalamazoo County
Kent County
Leelanau County
Lenawee County
Luce County
Mecosta County
Montmorency County
Muskegon County
Oakland County
Ottawa County
Presque Isle County
Shiawassee 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 16, 2017. http://michiganflora.net/species.aspx?id=55.