Thalictrum polycarpum |
Thalictrum mirabile |
|
---|---|---|
many fruit meadowrue, tall western meadow-rue |
little mountain meadow-rue |
|
Roots | fibrous. |
|
Stems | erect, 6-18(-20) dm, glabrous. |
weakly erect to reclining, 10-30 cm, glabrous. |
Leaves | blade 3-4x-ternately compound; leaflets orbiculate to obovate, apically 3-cleft or 3-parted, divisions undivided or shallowly 3-lobed, 15-40 mm wide, lobes rounded or somewhat acute, surfaces glabrous or glandular. |
blade: basal usually ternately compound, distal gradually less divided; leaflets nearly orbiculate to orbiculate-reniform, apically 4-7-lobed, 20-30 mm wide, lobe margins crenate, surfaces abaxially glaucescent. |
Inflorescences | terminal, panicles, many flowered. |
panicles, few flowered. |
Flowers | sepals whitish to purplish, elliptic to ovate or lanceolate, 2-4(-5) mm; filaments whitish to pinkish, 3-6 mm; anthers (1.4-)2-4 mm, distinctly apiculate. |
sepals white, spatulate to rhombic-spatulate, 1.5 mm; filaments white, 2-3 mm; anthers 0.3-0.5 mm. |
Achenes | 10-15, spreading in globose heads, not reflexed, sessile or nearly so; stipe 0-0.6 mm; body nearly globose to obovoid to obliquely obovate, laterally compressed, somewhat inflated and papery, 4-7(-8) mm, glabrous to glandular, often with 1 or 2 primary veins on each side, veins sinuous, branched, anastomosing-reticulate; beak 2-4 mm. |
3-8, spreading; stipe 2.5-3.5 mm, nearly as long as achene body; body flat, 2.5-4 mm, abaxial margin convex, adaxial margin straight, conspicuously 3-veined on each face; beak minute. |
Thalictrum polycarpum |
Thalictrum mirabile |
|
Phenology | Flowering mid-late spring (Apr–Jun). | Flowering late spring–early summer (Jun). |
Habitat | Streamsides and other moist places, forests, and open woodlands | Moist sandstone bluffs, sinks, and rocky crevices |
Elevation | 600-3100 m (2000-10200 ft) | 200-1500 m (700-4900 ft) |
Distribution |
CA; NV; OR; UT; Mexico (Baja California)
|
AL; GA; KY; NC; TN |
Discussion | Thalictrum polycarpum is the only species in sect. Heterogamia with anastomosing-reticulate veins on the achene. The stems and roots of Thalictrum polycarpum are considered poisonous when ingested by humans or cattle; Native Americans used this species medicinally as a wash for headaches, as an applications for sprains, and as a universal charm and panacea (D. E. Moerman 1986). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Thalictrum mirabile is very similar to T. clavatum. Field studies are in progress to clarify the status of this species. (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. fendleri var. polycarpum | |
Name authority | (Torrey) S. Watson: Proc. Amer. Acad. Arts 14: 288. (1879) | Small: Bull. Torrey Bot. Club 27: 277. (1900) |
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