Ranunculus glaberrimus |
Ranunculus kamtschaticus |
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sagebrush buttercup, smooth buttercup |
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Roots | cylindric, 1-3 mm thick. |
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Stems | prostrate or ascending, 4-15 cm, glabrous, each with 1-4 flowers. |
erect from short caudices or rhizomes, not rooting nodally, glabrous, not bulbous-based. |
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Basal leaves | persistent, blades reniform or obovate to very narrowly elliptic, 0.7-5.2 × 1-2 cm, base truncate, obtuse or attenuate, margins entire or with 3 broad, apical crenae, apex rounded to acute. |
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Basal leaf blades | circular to ovate or obovate, undivided, 0.8-2.6 × 0.6-1.4 cm, margins entire or serrulate, apex obtuse or rounded. |
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Flowers | pedicels glabrous or nearly so; receptacle glabrous; sepals 5-8 × 3-7 mm, abaxially glabrous or sparsely pilose, hairs colorless; petals 5-10, 8-13 × 5-12 mm; nectary scale glabrous or ciliate. |
receptacle glabrous; sepals spreading, 4-8 × 2-4 mm, glabrous; petals yellow, 5-12 × 1-3 mm. |
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Heads of achenes | globose, 7-12(-20) × 6-11(-20) mm; achenes 1.4-2.2 × 1.1-1.8 mm, usually finely pubescent; beak subulate or lance-subulate, straight or curved, 0.4-1 mm. |
depressed-hemispheric or -conic, 3-4 × 5 mm; achenes 2-2.6 × 1-1.4 mm, glabrous; beak persistent, lanceolate, straight, 0.8-1.2 mm. |
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Tuberous | roots absent. |
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2n | = 16. |
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Ranunculus glaberrimus |
Ranunculus kamtschaticus |
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Phenology | Flowering late spring–summer (May–Aug). | |||||
Habitat | Tundra on moist slopes | |||||
Elevation | 0-300 m (0-1000 ft) | |||||
Distribution |
AZ; CA; CO; ID; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; SK
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AK; Asia |
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Discussion | Varieties 2 (2 in the flora). Usually only a minority of the ovaries develop, and the fruiting receptacle is completely hidden by aborted ovaries. Populations growing at high elevations (Ranunculus glaberrimus var. ellipticus) and low elevations (var. glaberrimus) are usually well differentiated, but these varieties intergrade at intermediate elevations. The Thompson Indians rubbed the flowers or the whole plant of Ranunculus glaberrimus on arrow points as a poison (D. E. Moerman 1986). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 3. | FNA vol. 3. | ||||
Parent taxa | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes | Ranunculaceae > Ranunculus > subg. Oxygraphis | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Oxygraphis glacialis | |||||
Name authority | Hooker: Fl. Bor.-Amer. 1: 12. (1829) | de Candolle: Syst. Nat. 1: 302. (1817) | ||||
Web links |
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