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