Ranunculus rhomboideus |
Ranunculus lapponicus |
|
---|---|---|
Labrador buttercup, prairie buttercup, prairie crowfoot |
Lapland buttercup, renoncule de lapponie |
|
Roots | slender, 0.8-1.8 mm thick. |
|
Stems | erect, 5-22 cm, pilose or occasionally glabrous, each with 3-12 flowers. |
prostrate, buried, 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 reniform, deeply 3-parted, 1.1-2.6 × 1.6-4.3 cm, segments undivided or 1x cleft, margins crenate, apex rounded. |
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 or reflexed from base, 4-7 × 2-5 mm, glabrous; petals yellow, 5-6 × 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. |
hemispheric, 5-7 × 8-10 mm; achenes 3.8-4.2 × 2-2.2 mm, glabrous; beak persistent, lanceolate, curved, tip hooked, 1.6-2.4 mm. |
Tuberous | roots absent. |
|
2n | = 16. |
= 16. |
Ranunculus rhomboideus |
Ranunculus lapponicus |
|
Phenology | Flowering spring (Apr–Jun). | Flowering late spring–summer (Jun–Jul). |
Habitat | Prairies, or occasionally open woods or thickets | Boggy places and lakesides in tundra, muskeg, and boreal forest |
Elevation | 0-900 m (0-3000 ft) | 0-900 m (0-3000 ft) |
Distribution |
IA; IL; MI; MN; MT; ND; NE; SD; WI; AB; BC; MB; NT; ON; SK
|
AK; ME; MI; MN; AB; BC; MB; NB; NF; NT; ON; QC; SK; YT; Greenland; 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.) |
Starving individuals among western Eskimo groups ate the soaked plant of Ranunculus lapponicus as a dietary aid before consuming other food (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. Coptidium |
Sibling taxa | ||
Name authority | Goldie: Edinburgh J. Sci. 6: 329. (1822) | Linnaeus: Sp. Pl. 1: 553. (1753) |
Web links |