Ranunculus rhomboideus |
Ranunculus uncinatus |
|
---|---|---|
Labrador buttercup, prairie buttercup, prairie crowfoot |
hook fruit buttercup, little buttercup, woodland buttercup |
|
Roots | slender, 0.8-1.8 mm thick. |
never tuberous. |
Stems | erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 flowers. |
erect, never rooting nodally, hispid or glabrous, base not bulbous. |
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 cordate to reniform in outline, 3-parted or sometimes 3-foliolate, 1.8-5.6 × 2.8-8.3 cm, segments again lobed, ultimate segments elliptic to lanceolate, margins toothed or crenate-toothed, apex acute to rounded-obtuse. |
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 reflexed or sometimes spreading, 2-3.5 × 1-2 mm, pubescent; petals 5, yellow, 2-4(-6) × 1-2(-3) 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, 4-7 × 4-7 mm; achenes 2-2.8 × 1.6-2 mm, glabrous or sparsely hispid, margin forming narrow rib 0.1-0.2 mm wide; beak persistent, lanceolate, curved, hooked, 1.2-2.5 mm. |
2n | = 16. |
= 28. |
Ranunculus rhomboideus |
Ranunculus uncinatus |
|
Phenology | Flowering spring (Apr–Jun). | Flowering spring–summer (Apr–Aug). |
Habitat | Prairies, or occasionally open woods or thickets | Moist meadows or woods, often along streams |
Elevation | 0-900 m (0-3000 ft) | 0-3400 m (0-11200 ft) |
Distribution |
IA; IL; MI; MN; MT; ND; NE; SD; WI; AB; BC; MB; NT; ON; SK
|
AK; AZ; CA; CO; ID; MT; NM; NV; OR; WA; WY; AB; 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.) |
Plants with hispid stems and achenes are often separated as Ranunculus uncinatus var. parviflorus; these two characters are poorly correlated, however, and sometimes vary between plants in a single collection. Ranunculus uncinatus was reported from northeastern Alberta and adjacent Northwest Territories by H. J. Scoggan (1978-1979, part 3). The specimens have hairy receptacles and straight, broad achene beaks; they apparently represent small individuals of R. macounii. Some Native Americans used Ranunculus uncinatus as an antrirheumatic, a diaphoretic, a disinfectant, and an orthopedic aid, as well as in herbal steam baths intended to soothe sore muscles and rheumatism (D. E. Moerman 1986). (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. Ranunculus |
Sibling taxa | ||
Synonyms | R. bongardii, R. bongardii var. tenellus, R. uncinatus var. earlei, R. uncinatus var. parviflorus | |
Name authority | Goldie: Edinburgh J. Sci. 6: 329. (1822) | D. Don: in G. Don, Gen. Hist. 1: 35. (1831) |
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