Ranunculus gelidus |
Ranunculus sardous |
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arctic buttercup, modest buttercup, wetslope buttercup |
hairy buttercup, hairy crowfoot |
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Roots | slender, 0.5-1 mm thick. |
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Stems | erect or decumbent from short caudices, 3-22 cm, glabrous, each with 1-5 flowers. |
nearly erect, 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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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. |
pedicellate; receptacle pilose; sepals 5, reflexed, 3-8 × 1.5-3 mm, pilose; petals 5, 7-10 × 4-8 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 or ovoid, 5-8 × 6-7 mm; achenes 15-35 per head, 2-3 × 2-3 mm, faces sparsely papillate or sometimes smooth, glabrous, margin smooth; beak oblong to deltate, curved, 0.4-0.7 mm. |
Basal | and lower cauline leaf blades ovate to cordate, 3-foliolate, 2-6 × 2-6 cm, leaflets again parted, leaflet base truncate to acute, margins crenate-dentate to crenate-lobulate, apex rounded to obtuse. |
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2n | = 16. |
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Ranunculus gelidus |
Ranunculus sardous |
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Phenology | Flowering late spring–summer (Jun–Aug). | Flowering late winter–summer (Mar–Aug). |
Habitat | Open arctic and alpine slopes | Roadsides, fields, open woods |
Elevation | 0-4000 m (0-13100 ft) | 0-200 m (0-700 ft) |
Distribution |
AK; CO; ID; MT; OR; UT; WA; WY; AB; BC; NT; YT; Asia
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AL; AR; CA; FL; GA; IL; KS; KY; LA; MD; MO; MS; NC; NJ; NY; OK; OR; PA; RI; SC; TN; TX; VA; BC; native to Europe; Pacific Islands; Australia [Introduced in North America]
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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.) |
Ranunculus sardous was collected in New Brunswick and Ontario in the 1800s, but it apparently has not persisted in those provinces. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | R. gelidus subsp. grayi, R. grayi, R. verecundus | R. parvulus |
Name authority | Karelin & Kirilov: Bull. Soc. Imp. Naturalistes Moscou 15: 133. (1842) | Crantz: Stirp. Austr. Fasc. 2: 84. (1763) |
Web links |
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