Ranunculus rhomboideus |
Ranunculus eschscholtzii |
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Labrador buttercup, prairie buttercup, prairie crowfoot |
Eschscholtz's buttercup, snow buttercup, subalpine buttercup |
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Roots | slender, 0.8-1.8 mm thick. |
slender, 0.4-1.6 mm thick. |
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Stems | erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 flowers. |
erect or decumbent from short or long caudices, 4-27 cm, glabrous, each with 1-3 flowers. |
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Basal leaves | persistent, blades ovate to rhombic, undivided or rarely innermost 3-parted, 1.1-5.3 × 0.9-3.6 cm, base obtuse, margins crenate with 5 crenae, apex rounded. |
persistent, blades reniform or cordate to obovate or broadly oblong, lobed or 3-parted, 0.5-4.1 × 0.8-3.7 cm, segments again 1(-2)×-lobed, base obtuse to cordate, apices of segments rounded in outline. |
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Flowers | pedicels pilose; receptacle pilose; sepals 4-6 × 1.5-3 mm, abaxially pilose, hairs colorless; petals 5, 6-8 × 2-4 mm; nectary scale glabrous. |
pedicels glabrous; receptacle glabrous or sparsely pilose; sepals 4-8 × 2-6 mm, abaxially glabrous or pilose; petals 5-8, 6-16 × 4-16 mm; nectary scale glabrous. |
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Heads of achenes | depressed-globose, 4-6 × 5-7 mm; achenes 1.8-2.2 × 1.2-1.8 mm, glabrous; beak slender, curved, 0.2-0.3 mm. |
cylindric or ovoid, 5-10 × 4-7 mm; achenes 1.4-2 × 1-1.6 mm, glabrous or sparsely pubescent; beak lanceolate or subulate, straight (sometimes curved when immature), 0.6-1.8 mm. |
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2n | = 16. |
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Ranunculus rhomboideus |
Ranunculus eschscholtzii |
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Phenology | Flowering spring (Apr–Jun). | |||||||||||||||||
Habitat | Prairies, or occasionally open woods or thickets | |||||||||||||||||
Elevation | 0-900 m (0-3000 ft) | |||||||||||||||||
Distribution |
IA; IL; MI; MN; MT; ND; NE; SD; WI; AB; BC; MB; NT; ON; SK
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AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC; NT; YT
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Discussion | In addition to the range given above, L. D. Benson (1948) cited nineteenth-century specimens from Quebec, New York, Massachusetts, and Rhode Island. No modern specimens have been seen from those areas. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 6 (5 in the flora). (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. Ranunculus > sect. Epirotes | ||||||||||||||||
Sibling taxa | ||||||||||||||||||
Subordinate taxa | ||||||||||||||||||
Name authority | Goldie: Edinburgh J. Sci. 6: 329. (1822) | Schlechtendal: Animadv. Bot. Ranunc. Cand. 2: 16. (1820) | ||||||||||||||||
Web links |