Ptelea trifoliata L.
Coefficient of Conservatism: 4
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt Shrub

Ptelea trifoliata B. S. Walters

Forested to open dunes along Lake Michigan; sandy fields and knolls; fencerows and dry bluffs or banks; rarely in moister sites along rivers and edges of floodplain forests.The Upper Peninsula collection is escaped from cultivation, and perhaps also the Missaukee County collection.

The species is variable, but almost all Michigan plants are var. trifoliata. A few from the Lake Michigan area have been referred to var. mollis Torr. & A. Gray, which differs in having dense pubescence on twigs, leaves, and inflorescences. 


Allegan County
Barry County
Berrien County
Cass County
Hillsdale County
Ingham County
Ionia County
Kalamazoo County
Kent County
Lenawee County
Manistee County
Marquette County
Missaukee County
Monroe County
Muskegon County
Newaygo County
Oakland County
Ottawa County
St. Joseph 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. December 2, 2022.