Thalictrum dioicum |
Thalictrum clavatum |
|
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early meadow-rue, pigamon dioïque, quicksilver-weed |
mountain meadow-rue |
|
Roots | yellow to light brown, fibrous, from stout caudex. |
few, blackish, filiform or somewhat tuberous. |
Stems | erect, 30-80 cm, glabrous or glandular. |
erect, not scapose, 15-50(-60) cm, glabrous. |
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. |
blade: leaflets reniform to obovate, apically 4-7-lobed, 10-30 mm wide, lobe margins crenate, surfaces abaxially glaucous. |
Inflorescences | terminal and axillary, panicles to corymbs, many flowered. |
panicles or nearly corymbs, few flowered. |
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. |
pedicels very slender, elongate; sepals white, obovate-spatulate, 2.5-4 mm; filaments white, 2.5-4 mm; anthers 0.3-0.5 mm. |
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. |
3-8, spreading; stipe 1-3(-4) mm, usually ± 1/2 as long (sometimes nearly as long) as achene body; body flat, falcate, 3-5 mm, abaxially convex, adaxially concave, conspicuously 3-veined on each face; beak minute. |
Thalictrum dioicum |
Thalictrum clavatum |
|
Phenology | Flowering spring (Apr–Jun). | Flowering spring–summer (May–Jul). |
Habitat | Rocky woods, ravines, and alluvial terraces, mountains and piedmont | Rich moist woods, cliffs, seepage slopes, and mountain streams in mountains and piedmont |
Elevation | 10-1000 m (0-3300 ft) | 500 m (1600 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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GA; KY; NC; SC; TN; VA; WV
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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.) |
|
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Thalictrum > sect. Heterogamia | Ranunculaceae > Thalictrum > sect. Physocarpum |
Sibling taxa | ||
Synonyms | T. filipes, T. nudicaule | |
Name authority | Linnaeus: Sp. Pl. 1: 545. (1753) | de Candolle: Syst. Nat. 1: 171. (1817) |
Web links |