Thalictrum dioicum |
Thalictrum sect. Heterogamia |
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early meadow-rue, pigamon dioïque, quicksilver-weed |
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Roots | yellow to light brown, fibrous, from stout caudex. |
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Stems | erect, 30-80 cm, glabrous or glandular. |
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Leaves | blade 1-4x-ternately compound; leaflets reniform or cordate to obovate or orbiculate, apically 3-12-lobed, 10-45 mm wide, lobe margins often crenate, surfaces abaxially glabrous or glandular. |
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Inflorescences | terminal and axillary, panicles to corymbs, many flowered. |
panicles, racemes, or corymbs. |
Flowers | sepals greenish to purple, ovate or obovate to oval, 1.8-4 mm; filaments yellow to greenish yellow, 3.5-5.5 mm; anthers 2-4 mm, mucronate to acuminate; stigma purple. |
unisexual (rarely also bisexual in T. debile and T. fendleri); sepals 4(-6); filaments filiform (to slightly clavate in T. heliophilum). |
Achenes | (3-)7–13, not reflexed, sessile or nearly so; stipe terete, 0-0.2 mm; body ovoid to ellipsoid, not laterally compressed, 3.5-5 mm, glabrous, very strongly veined, veins not anastomosing-reticulate; beak 1.5-3 mm. |
sessile to nearly sessile. |
Thalictrum dioicum |
Thalictrum sect. Heterogamia |
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Phenology | Flowering spring (Apr–Jun). | |
Habitat | Rocky woods, ravines, and alluvial terraces, mountains and piedmont | |
Elevation | 10-1000 m (0-3300 ft) | |
Distribution |
AL; CT; DC; GA; IA; IL; IN; KS; KY; MA; MD; ME; MI; MN; MO; NC; ND; NE; NH; NJ; NY; OH; PA; RI; SC; SD; TN; VA; VT; WI; WV; MB; ON; QC
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North America; Mexico |
Discussion | Glandular plants of Thalictrum dioicum have often been misidentified as T. revolutum despite important differences, especially the leaflets having crenate versus entire lobe margins, respectively. The stamens in both T. dioicum and T. revolutum are pendulous. Native Americans used roots of Thalictrum dioicum in various preparations to treat diarrhea and vomiting and for heart palpitations (D. E. Moerman 1986). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Species 25 (11 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Thalictrum > sect. Heterogamia | Ranunculaceae > Thalictrum |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | T. unranked Heterogamia | |
Name authority | Linnaeus: Sp. Pl. 1: 545. (1753) | (de Candolle) B. Boivin: Rhodora 46: 432. (1944) |
Web links |