Ranunculus gelidus |
Ranunculus macranthus |
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arctic buttercup, modest buttercup, wetslope buttercup |
large buttercup, showy buttercup, smallflower buttercup |
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Roots | slender, 0.5-1 mm thick. |
tuberous. |
Stems | erect or decumbent from short caudices, 3-22 cm, glabrous, each with 1-5 flowers. |
erect or decumbent, never rooting nodally, hispid, base not bulbous. |
Basal leaves | 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. |
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Basal leaf blades | ovate in outline, 3-5-foliolate, 3.8-10 × 2.7-9 cm, leaflets 1x-lobed, ultimate segments narrowly elliptic to oblanceolate, margins entire or with few teeth, apex broadly acute to rounded-obtuse. |
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Flowers | 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. |
receptacle hispid; sepals spreading or weakly reflexed ca. 1 mm above base, 7-10 × 3-5 mm, hispid; petals 10-22, yellow, 12-22 × 4-9 mm. |
Heads of achenes | 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. |
globose to cylindric, 8-14 × 8-10 mm; achenes 2.2-4.2 × 2.8-3.4 mm, glabrous, margin forming narrow rib 0.4-0.6 mm wide; beak usually persistent, filiform from deltate base, straight, 2-4 mm. |
2n | = 16. |
= 32. |
Ranunculus gelidus |
Ranunculus macranthus |
|
Phenology | Flowering late spring–summer (Jun–Aug). | Flowering late winter–spring (Mar–May). |
Habitat | Open arctic and alpine slopes | Riverbanks and wet meadows |
Elevation | 0-4000 m (0-13100 ft) | 0-400 m (0-1300 ft) |
Distribution |
AK; CO; ID; MT; OR; UT; WA; WY; AB; BC; NT; YT; Asia
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TX
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Discussion | 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.) |
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Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | R. gelidus subsp. grayi, R. grayi, R. verecundus | R. fascicularis var. cuneiformis |
Name authority | Karelin & Kirilov: Bull. Soc. Imp. Naturalistes Moscou 15: 133. (1842) | Scheele: Linnaea 21: 585. (1848) |
Web links |