Enemion biternatum Raf.
Common Name: FALSE RUE-ANEMONE
Synonym: Isopyrum biternatum
Coefficient of Conservatism: 8
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Nt P-Forb

Enemion biternatum A. A. Reznicek

Isopyrum biternatum of Michigan Flora.

Rich deciduous forests, often on shaded banks of streams. Superficially, it resembles rue-anemone (Thalictrum thalictroides) in its white flowers and delicate, clearly compound, Thalictrum-like leaves, although the leaves are alternate as well as basal and the fruit is a few-seeded follicle rather than an achene. In Enemion, the larger leaflets are clearly lobed, one or more sinuses extending at least a third of the way to the base of the leaflet. Furthermore, the tips of the lobes in Enemion bear a minute projecting callus, while in Thalictrum thalictroides the tips are usually minutely notched. The lobes in Enemion give a ± oblong impression, in contrast to the rounded leaflets of Thalictrum.

Though rarely noted in floras, this species sends up wintergreen, frost resistant leaves in the fall, a fact noted as early as 1869 with a collection from Eaton Co, by E. C. Allmendinger.

Locations

Allegan County
Barry County
Berrien County
Branch County
Calhoun County
Cass County
Clinton County
Eaton County
Genesee County
Gratiot County
Hillsdale County
Ingham County
Ionia County
Isabella County
Kalamazoo County
Kent County
Lapeer County
Lenawee County
Mecosta County
Midland County
Muskegon County
Newaygo County
Oceana County
Osceola County
Ottawa County
Saginaw County
Shiawassee County
Van Buren County
Washtenaw County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. May 27, 2017. http://www.michiganflora.net/species.aspx?id=2373.