Apios americana Medik.
Coefficient of Conservatism: 3
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt P-Vine

A low vine of moist forests, shores, river-bank thickets, marshes and meadows, wet prairies, streamside. Strings of edible tubers are produced underground and can be prepared like potatoes. The flowers are normally a very deep red- or purple-brown, with a strongly curved, even coiled, keel.

Rarely, young plants will bear mostly or only trifoliolate leaves; these can be distinguished from Amphicarpaea by the relatively large perennial underground tubers. Amphicarpaea is a fibrous rooted annual (but do not mistake the large underground seeds of Amphicarpaea for tubers). 

Michigan plants are mostly, if not entirely, sterile triploids (see Simon & Bruneau, 2004), rendering baffling their dispersal throughout much of the state. No fruiting specimens from Michigan are in the holdings at MICH. The fruits, when produced, are elongate, glabrous, slightly flattened legumes, lightly constricted between the large, dark brown, glabrous seeds.




Allegan County
Antrim County
Barry County
Bay County
Benzie County
Berrien County
Calhoun County
Cass County
Cheboygan County
Clinton County
Delta County
Genesee County
Gratiot County
Hillsdale County
Huron County
Ingham County
Ionia County
Isabella County
Jackson County
Kalamazoo County
Kent County
Lapeer County
Lenawee County
Livingston County
Mackinac County
Manistee County
Mason County
Mecosta County
Menominee County
Midland County
Monroe County
Montcalm County
Muskegon County
Newaygo County
Oakland County
Ottawa County
Roscommon County
Shiawassee County
St. Clair County
St. Joseph County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. May 22, 2022. https://michiganflora.net/species.aspx?id=1271.