Ranunculus pallasii |
Ranunculus glaberrimus |
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Pallas' buttercup, renoncule de Pallas |
sagebrush buttercup, smooth buttercup |
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Roots | cylindric, 1-3 mm thick. |
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Stems | creeping or floating, rooting nodally, glabrous, not bulbous-based. |
prostrate or ascending, 4-15 cm, glabrous, each with 1-4 flowers. |
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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 | linear to obovate, undivided or 3-lobed, 1.5-3.6 × 0.3-2 cm, lobes lanceolate or elliptic, margins entire, apex rounded to acuminate. |
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Flowers | receptacle glabrous; sepals spreading, 6-10 × 4-7 mm, glabrous; petals 7-11, white or pink, 8-13 × 3-6 mm. |
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. |
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Heads of achenes | globose or hemispheric, 5-12 × 9-15 mm; achenes 4.2-5.2 × 2.4-3.2 mm, glabrous; beak persistent, lanceolate, straight or curved, 1-1.2 mm. |
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. |
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Tuberous | roots absent. |
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2n | = 32. |
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Ranunculus pallasii |
Ranunculus glaberrimus |
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Phenology | Flowering summer (Jul–Aug). | |||||
Habitat | Shallow water of bogs and pools in muskeg and tundra | |||||
Elevation | 0-700 m (0-2300 ft) | |||||
Distribution |
AK; MB; NF; NT; ON; QC; YT; Eurasia |
AZ; CA; CO; ID; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; SK
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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. Pallasiantha | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Schlechtendal: Animadv. Bot. Ranunc. Cand. 1: 15. (1819) | Hooker: Fl. Bor.-Amer. 1: 12. (1829) | ||||
Web links |
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