Ranunculus glaberrimus |
Ranunculus lobbii |
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sagebrush buttercup, smooth buttercup |
Lobb's aquatic buttercup, Lobb's buttercup, Lobb's water-buttercup |
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Roots | cylindric, 1-3 mm thick. |
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Stems | prostrate or ascending, 4-15 cm, glabrous, each with 1-4 flowers. |
glabrous. |
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Leaves | laminate and filiform-dissected; laminate leaf blades reniform in outline, deeply 3-parted, 0.5-0.8 × 0.9-1.5 cm, segments elliptic or obovate, margins sometimes notched; filiform-dissected leaves sometimes few and inconspicuous, stipules gradually tapering upward, connate for whole length, mostly petiolate. |
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Basal leaves | persistent, blades reniform or obovate to very narrowly elliptic, 0.7-5.2 × 1-2 cm, base truncate, obtuse or attenuate, margins entire or with 3 broad, apical crenae, apex rounded to acute. |
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Flowers | pedicels glabrous or nearly so; receptacle glabrous; sepals 5-8 × 3-7 mm, abaxially glabrous or sparsely pilose, hairs colorless; petals 5-10, 8-13 × 5-12 mm; nectary scale glabrous or ciliate. |
receptacle glabrous; sepals spreading, 2-3 × 1-1.5 mm, glabrous; petals 5, 4-6 × 2-5 mm; style 1-1.5 mm. |
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Fruiting pedicels | recurved. |
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Heads of achenes | globose, 7-12(-20) × 6-11(-20) mm; achenes 1.4-2.2 × 1.1-1.8 mm, usually finely pubescent; beak subulate or lance-subulate, straight or curved, 0.4-1 mm. |
hemispheric, 3 × 4-5 mm; achenes 2-2.4 × 1.4-1.8 mm, glabrous; beak deciduous, sometimes leaving stub to 0.2 mm. |
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Ranunculus glaberrimus |
Ranunculus lobbii |
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Phenology | Flowering late winter–spring (Mar–May). | |||||
Habitat | Shallow ponds and vernal pools | |||||
Elevation | 0-300 m (0-1000 ft) | |||||
Distribution |
AZ; CA; CO; ID; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; SK
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CA; OR; BC
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Discussion | Varieties 2 (2 in the flora). Usually only a minority of the ovaries develop, and the fruiting receptacle is completely hidden by aborted ovaries. Populations growing at high elevations (Ranunculus glaberrimus var. ellipticus) and low elevations (var. glaberrimus) are usually well differentiated, but these varieties intergrade at intermediate elevations. The Thompson Indians rubbed the flowers or the whole plant of Ranunculus glaberrimus on arrow points as a poison (D. E. Moerman 1986). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 3. | FNA vol. 3. | ||||
Parent taxa | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes | Ranunculaceae > Ranunculus > subg. Batrachium | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | R. hydrocharis | |||||
Name authority | Hooker: Fl. Bor.-Amer. 1: 12. (1829) | (Hiern) A. Gray: Proc. Amer. Acad. Arts 21: 364. (1886) | ||||
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