Rorippa sylvestris (L.) Besser
Coefficient of Conservatism: *
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Ad P-Forb

Swamps and muddy to rocky shores along rivers and lakes; also weedy in lawns, cultivated ground, ditches, and city streets. Native of Europe and western Asia, now widespread in the northeastern United States and adjacent Canada, more sporadically across the continent. First collected in Michigan in 1891 in Wayne Co.

This is a perennial species, spreading by creeping roots (often erroneously termed rhizomes) and apparently distributed by fragments along streams and transportation routes as well as with transplanted nursery stock. Our other two "terrestrial" species are annuals or biennials. The petals are usually described as 4–5 mm long, but ours are almost always less than 3.5 mm.


Alger County
Allegan County
Berrien County
Clinton County
Eaton County
Emmet County
Gogebic County
Ingham County
Kalamazoo County
Kent County
Lenawee County
Macomb County
Marquette County
Monroe County
Muskegon County
Ottawa County
Saginaw County
Shiawassee County
St. Clair County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 20, 2021.