Ranunculus sardous |
Ranunculus rhomboideus |
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hairy buttercup, hairy crowfoot |
Labrador buttercup, prairie buttercup, prairie crowfoot |
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Roots | slender, 0.8-1.8 mm thick. |
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Stems | nearly erect, hispid, base not bulbous. |
erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 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. |
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Flowers | pedicellate; receptacle pilose; sepals 5, reflexed, 3-8 × 1.5-3 mm, pilose; petals 5, 7-10 × 4-8 mm. |
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. |
Heads of achenes | 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. |
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. |
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 sardous |
Ranunculus rhomboideus |
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Phenology | Flowering late winter–summer (Mar–Aug). | Flowering spring (Apr–Jun). |
Habitat | Roadsides, fields, open woods | Prairies, or occasionally open woods or thickets |
Elevation | 0-200 m (0-700 ft) | 0-900 m (0-3000 ft) |
Distribution |
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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IA; IL; MI; MN; MT; ND; NE; SD; WI; AB; BC; MB; NT; ON; SK
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Discussion | 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.) |
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.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Echinella | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes |
Sibling taxa | ||
Synonyms | R. parvulus | |
Name authority | Crantz: Stirp. Austr. Fasc. 2: 84. (1763) | Goldie: Edinburgh J. Sci. 6: 329. (1822) |
Web links |
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