Ranunculus rhomboideus |
Ranunculus gelidus |
|
---|---|---|
Labrador buttercup, prairie buttercup, prairie crowfoot |
arctic buttercup, modest buttercup, wetslope buttercup |
|
Roots | slender, 0.8-1.8 mm thick. |
slender, 0.5-1 mm thick. |
Stems | erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 flowers. |
erect or decumbent from short caudices, 3-22 cm, glabrous, each with 1-5 flowers. |
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 cordate or reniform, 3-parted, 0.5-1.8 × 0.8-3 cm, segments again lobed, base truncate or nearly cordate, apices of segments rounded. |
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 pubescent or glabrous; receptacle glabrous or pubescent; sepals 3-5 × 1-4 mm, pubescent or glabrous; petals 5, 3-6 × 1-5 mm; nectary scale glabrous. |
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 to ovoid-cylindric, 4-13 × 4-6 mm; achenes 1.2-2.4 × 0.8-2 mm, glabrous; beak subulate, curved or hooked, 0.4-0.8 mm. |
2n | = 16. |
= 16. |
Ranunculus rhomboideus |
Ranunculus gelidus |
|
Phenology | Flowering spring (Apr–Jun). | Flowering late spring–summer (Jun–Aug). |
Habitat | Prairies, or occasionally open woods or thickets | Open arctic and alpine slopes |
Elevation | 0-900 m (0-3000 ft) | 0-4000 m (0-13100 ft) |
Distribution |
IA; IL; MI; MN; MT; ND; NE; SD; WI; AB; BC; MB; NT; ON; SK
|
AK; CO; ID; MT; OR; UT; WA; WY; AB; BC; NT; YT; Asia
|
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.) |
Plants with small achenes are often separated as Ranunculus verecundus. Achene size varies continuously over the range given, however, and it is not correlated with the minor shape difference mentioned by L. D. Benson (1948). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes |
Sibling taxa | ||
Synonyms | R. gelidus subsp. grayi, R. grayi, R. verecundus | |
Name authority | Goldie: Edinburgh J. Sci. 6: 329. (1822) | Karelin & Kirilov: Bull. Soc. Imp. Naturalistes Moscou 15: 133. (1842) |
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