Ranunculus rhomboideus |
Ranunculus cooleyae |
|
---|---|---|
Labrador buttercup, prairie buttercup, prairie crowfoot |
Cooley's buttercup |
|
Roots | slender, 0.8-1.8 mm thick. |
|
Stems | erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 flowers. |
erect from short caudices, not rooting nodally, glabrous, not bulbous-based. |
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. |
blades circular to reniform in outline, 3-5-parted, 0.8-3.8 × 1.7-6.9 cm, segments again lobed, ultimate segments elliptic or oblong, margins crenate, apex rounded; cauline leaf 0-1, scalelike. |
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. |
receptacle glabrous; sepals spreading, yellow, 7-11 × 4-7 mm, glabrous; petals 11-15, yellow, 8-12 × 3-5 mm. |
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. |
hemispheric or spheric, 7-8 × 9-10 mm; achenes 2.4-4.6 × 1.2-2.2 mm, glabrous; beak persistent, filiform, hooked distally, 1-1.8 mm. |
Tuberous | roots absent. |
|
2n | = 16. |
= 16. |
Ranunculus rhomboideus |
Ranunculus cooleyae |
|
Phenology | Flowering spring (Apr–Jun). | Flowering late spring–summer (Jun–Aug). |
Habitat | Prairies, or occasionally open woods or thickets | Slopes near persistent snowbanks |
Elevation | 0-900 m (0-3000 ft) | 500-1800 m (1600-5900 ft) |
Distribution |
IA; IL; MI; MN; MT; ND; NE; SD; WI; AB; BC; MB; NT; ON; SK
|
AK; WA; BC
|
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.) |
|
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes | Ranunculaceae > Ranunculus > subg. Cyrtorhyncha > sect. Arcteranthis |
Sibling taxa | ||
Synonyms | Arcteranthis cooleyae, Kumlienia cooleyae | |
Name authority | Goldie: Edinburgh J. Sci. 6: 329. (1822) | Vasey & Rose ex Rose: Contr. U.S. Natl. Herb. 1: 289. (1894) |
Web links |