Iva annua L.
Common Name: ROUGH MARSH-ELDER
Coefficient of Conservatism: *
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Ad A-Forb

An annual weed of disturbed areas, native southwest of Michigan. First collected in 1916, as a waif in railroad yards on the west side of Detroit, Wayne Co.

This species, represented by a large fruited variety, was a well known crop in Native American agriculture, apparently primarily south and west of Michigan. 

Locations

Kent County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. June 17, 2021. https://michiganflora.net/species.aspx?id=381.