Ranunculus rhomboideus |
Ranunculus pallasii |
|
---|---|---|
Labrador buttercup, prairie buttercup, prairie crowfoot |
Pallas' buttercup, renoncule de Pallas |
|
Roots | slender, 0.8-1.8 mm thick. |
|
Stems | erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 flowers. |
creeping or floating, 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 linear to obovate, undivided or 3-lobed, 1.5-3.6 × 0.3-2 cm, lobes lanceolate or elliptic, margins entire, apex rounded to acuminate. |
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, 6-10 × 4-7 mm, glabrous; petals 7-11, white or pink, 8-13 × 3-6 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. |
globose or hemispheric, 5-12 × 9-15 mm; achenes 4.2-5.2 × 2.4-3.2 mm, glabrous; beak persistent, lanceolate, straight or curved, 1-1.2 mm. |
Tuberous | roots absent. |
|
2n | = 16. |
= 32. |
Ranunculus rhomboideus |
Ranunculus pallasii |
|
Phenology | Flowering spring (Apr–Jun). | Flowering summer (Jul–Aug). |
Habitat | Prairies, or occasionally open woods or thickets | Shallow water of bogs and pools in muskeg and tundra |
Elevation | 0-900 m (0-3000 ft) | 0-700 m (0-2300 ft) |
Distribution |
IA; IL; MI; MN; MT; ND; NE; SD; WI; AB; BC; MB; NT; ON; SK
|
AK; MB; NF; NT; ON; QC; YT; Eurasia |
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. Pallasiantha |
Sibling taxa | ||
Name authority | Goldie: Edinburgh J. Sci. 6: 329. (1822) | Schlechtendal: Animadv. Bot. Ranunc. Cand. 1: 15. (1819) |
Web links |