Juncus ranarius Songeon & E. P. Perrier
Common Name: FROG RUSH
Coefficient of Conservatism: *
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Ad A-Forb

Native of Eurasia and perhaps also coastal areas of North America; collected once as an introduction by O. A. Farwell in 1916 from River Rouge (Wayne Co.) This grows in moist, bare soil rather like the habitats of Juncus bufonius, but is often a plant of saline sites. Though Farwell’s collection lacks habitat data, it may have been associated with the industrial sites so prevalent near the junction of the Rouge River and the Detroit River. Farwell (1918) reported it as new to Michigan, but provided no additional details. The name Juncus ambiguus is sometimes misapplied to this plant.



Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. June 29, 2022. https://michiganflora.net/species.aspx?id=2915.