Geum urbanum L.
Common Name: AVENS
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad P-Forb

Geum urbanum A. A. Reznicek

A Eurasian weed, locally established at edges of thickets and disturbed, young forests. It occurs especially along trails in northern forests, but in southern Michigan, may be a yard and garden weed. First collected in Washtenaw Co. by A. A. Reznicek in 1978.

A 1927 collection from the University of Michigan Botanical Gardens notes "from Sweden" and likely was from cultivation. Perhaps it is not a coincidence that the 1978 first collection as a wild plant was from only a few blocks away. 

This hybridizes with the native G. canadense to form G. ×catlingii J.-P. Bernard & R. Gauthier, with pale yellow petals (but much longer than those of G. virginianum). See the image of a G. ×catlingii  flower with both parents under G. canadense. This hybrid has been confirmed from Calhoun and Washtenaw Cos., but is doubtless overlooked. A peculiarity of the hybrid is that the inflorescences may continue to grow, sometimes forming an elongated tangle.  


Alger County
Calhoun County
Gogebic County
Ingham County
Marquette County
Ontonagon County
Washtenaw County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. November 29, 2022.