Flora of North America species comparison

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Enemion biternatum

eastern false rue anemone, false rue anemone
Stems

10-40 cm, weakly rhizomatous;

roots fibrous.
Leaves

leaflets irregularly 2-3-lobed, lobes sometimes with 1-3 secondary lobes, apex rounded, glandular-apiculate;

surfaces abaxially glabrous.
Inflorescences

axillary, flowers solitary or loosely grouped in 2-4-flowered leafy racemes;

peduncle not strongly clavate.
Flowers

sepals 5.5-13.5 × 3.5-8.5 mm;

stamens 25-50;

filaments filiform to club-shaped, 1.8-5.8 mm.
Seeds

2.1-2.7 mm, minutely pubescent.
Follicles

sessile, upright to widely divergent;

body widely elliptic to widely obovate, 3.5-6.5 mm, gradually contracted into style beak;

beak 1.7-3 mm.
2n

= 14.

Enemion biternatum
Phenology Flowering spring.
Habitat Moist deciduous woods of valleys, flood plains, and ravine bottoms, occasionally in open pastures, often on limey soils
Elevation 25-1000 m (100-3300 ft)
Distribution
from FNA
AL; AR; FL; IA; IL; IN; KS; KY; MI; MN; MO; MS; NC; NY; OH; OK; SC; SD; TN; VA; WI; WV; ON
[WildflowerSearch map]
[BONAP county map]
Discussion

Enemion biternatum has been mistaken for the superficially similar Thalictrum thalictroides because of its white flowers and compound Thalictrum-like leaves. Enemion biternatum is easily distinguished, however, by its few-seeded follicles and deeply lobed leaves with glandular-apiculate apices. Thalictrum thalictroides, on the other hand, is characterized by having achenes and somewhat crenate leaves with notched apices.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 3.
Parent taxa Ranunculaceae > Enemion
Sibling taxa
E. hallii, E. occidentale, E. savilei, E. stipitatum
Synonyms Isopyrum biternatum
Name authority Rafinesque: J. Phys. Chim. Hist. Nat. Arts 91: 70. (1820)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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