Thalictrum venulosum |
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early meadow-rue, veiny meadow-rue, veiny-leaf meadow-rue |
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Stems | erect, 20-50 cm, glabrous, from rhizomes. |
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. |
Inflorescences | terminal, panicles, narrow and dense, 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. |
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. |
Thalictrum venulosum |
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Phenology | Flowering early summer-mid summer (Jun–Aug). |
Habitat | Prairies, riparian woods, and coniferous, deciduous, and mixed forests |
Elevation | 600-3700 m (2000-12100 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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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.) |
Source | FNA vol. 3. |
Parent taxa | Ranunculaceae > Thalictrum > sect. Heterogamia |
Sibling taxa | |
Name authority | Trelease: Proc. Boston Soc. Nat. Hist. 23: 302. (1886) |
Web links |