Ranunculus rhomboideus |
Ranunculus populago |
|
---|---|---|
Labrador buttercup, prairie buttercup, prairie crowfoot |
Cusick's buttercup, mountain buttercup, popular buttercup |
|
Roots | slender, 0.8-1.8 mm thick. |
thickened basally, glabrous. |
Stems | erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 flowers. |
erect or ascending, never rooting nodally, glabrous. |
Leaves | basal leaf blades with base obtuse to cordate; proximal cauline leaf blades semicircular to cordate or ovate, 1.2-5.1 × 1.5-2.9 cm, base cordate to broadly obtuse, margins entire or crenulate, apex broadly acute to rounded. |
|
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. |
|
Inflorescences | bracts narrowly elliptic to ovate or lanceolate. |
|
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 or hispidulous; sepals 4-5, spreading or reflexed from base, 3-5 × 2-4 mm, glabrous; petals 5-6, 4-9 × 2-5 mm; nectary scales 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. |
hemispheric, 3 × 4-5 mm; achenes 1.6-1.8 × 1.2 mm, glabrous; beak lance-subulate, straight, 0.2-1 mm. |
2n | = 16. |
|
Ranunculus rhomboideus |
Ranunculus populago |
|
Phenology | Flowering spring (Apr–Jun). | Flowering spring–summer (Apr–Aug). |
Habitat | Prairies, or occasionally open woods or thickets | Wet ground and shallow water, in wet meadows, bogs, streams, lakes |
Elevation | 0-900 m (0-3000 ft) | 1300-2000 m (4300-6600 ft) |
Distribution |
IA; IL; MI; MN; MT; ND; NE; SD; WI; AB; BC; MB; NT; ON; SK
|
CA; ID; MT; OR; WA
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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. Ranunculus > sect. Flammula |
Sibling taxa | ||
Name authority | Goldie: Edinburgh J. Sci. 6: 329. (1822) | Greene: Erythea 3: 19. (1895) |
Web links |