Difference between revisions of "Ranunculus uncinatus"
in G. Don, Gen. Hist. 1: 35. 1831.
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|genus=Ranunculus | |genus=Ranunculus | ||
|subgenus=Ranunculus subg. Ranunculus | |subgenus=Ranunculus subg. Ranunculus | ||
Latest revision as of 21:49, 5 November 2020
Stems erect, never rooting nodally, hispid or glabrous, base not bulbous. Roots never tuberous. Basal leaf 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: 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 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 = 28.
Phenology: Flowering spring–summer (Apr–Aug).
Habitat: Moist meadows or woods, often along streams
Elevation: 0-3400 m
Distribution
Alta., B.C., Alaska, Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Wash., Wyo.
Discussion
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).
Selected References
None.