Thalictrum venulosum |
Thalictrum dioicum |
|
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early meadow-rue, veiny meadow-rue, veiny-leaf meadow-rue |
early meadow-rue, pigamon dioïque, quicksilver-weed |
|
Roots | yellow to light brown, fibrous, from stout caudex. |
|
Stems | erect, 20-50 cm, glabrous, from rhizomes. |
erect, 30-80 cm, glabrous or glandular. |
Leaves | blade 3-4x-ternately compound; leaflets obovate to orbiculate, apically 3-5-lobed, 5-20 mm, lobe margins crenate, surfaces abaxially glabrous or glandular-puberulent. |
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. |
Inflorescences | terminal, panicles, narrow and dense, many flowered. |
terminal and axillary, panicles to corymbs, many flowered. |
Flowers | sepals greenish white, lanceolate or broadly ovate to elliptic or obovate, 2-4 mm; filaments colored, not white, (1.8-)3-5.5 mm; anthers 2-3.5 mm, blunt to mucronate; stigma commonly yellowish. |
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. |
Achenes | 5-17, erect to spreading, not reflexed, nearly sessile; stipe 0.1-0.3 mm; body often distinctly curved, elliptic-oblong, nearly terete to slightly flattened, adaxial surface 3-4(-6) mm, glabrous to glandular, veins distinct, not anastomosing-reticulate; beak 1.5-2.5(-3) mm. |
(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. |
Thalictrum venulosum |
Thalictrum dioicum |
|
Phenology | Flowering early summer-mid summer (Jun–Aug). | Flowering spring (Apr–Jun). |
Habitat | Prairies, riparian woods, and coniferous, deciduous, and mixed forests | Rocky woods, ravines, and alluvial terraces, mountains and piedmont |
Elevation | 600-3700 m (2000-12100 ft) | 10-1000 m (0-3300 ft) |
Distribution |
CO; ID; MN; MT; ND; NE; NM; NV; OR; SD; UT; WA; WI; WY; AB; BC; MB; NT; ON; QC; SK; YT
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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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Discussion | Thalctrum venulosum is similar to T. confine and T. occidentale. Careful field studies are needed to clarify the relationships among these taxa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. Heterogamia |
Sibling taxa | ||
Name authority | Trelease: Proc. Boston Soc. Nat. Hist. 23: 302. (1886) | Linnaeus: Sp. Pl. 1: 545. (1753) |
Web links |