Ranunculus glaberrimus |
Ranunculus hystriculus |
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sagebrush buttercup, smooth buttercup |
waterfall false 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. |
erect from short caudices, not rooting nodally, glabrous, not bulbous-based. |
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Leaves | basal leaf blades semicircular or reniform in outline, shallowly 5-7-lobed, 1.2-4.6 × 1.8-6.6 cm, ultimate segments semicircular, margins crenate, apex rounded or weakly apiculate; cauline leaves 0-2, scalelike. |
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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, white or pale yellow, 6-13 × 3-6 mm, glabrous; petals 8-12, greenish, 2-4 × 0.6-1.6 mm. |
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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. |
ovoid, 6-7 × 6-8 mm; achenes 3.8-4.2 × 0.8-1 mm, canescent; beak persistent, filiform, 1.2-1.4 mm, hooked distally. |
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Tuberous | roots absent. |
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Ranunculus glaberrimus |
Ranunculus hystriculus |
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Phenology | Flowering winter–summer (Feb–Jul). | |||||
Habitat | Wet places near streams, especially around waterfalls | |||||
Elevation | 300-2300 m (1000-7500 ft) | |||||
Distribution |
AZ; CA; CO; ID; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; SK
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CA
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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.) |
Ranunculus hystriculus is endemic to the west slope of the Sierra Nevada. (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. Cyrtorhyncha > sect. Pseudaphanostemma | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Kumlienia hystriculus | |||||
Name authority | Hooker: Fl. Bor.-Amer. 1: 12. (1829) | A. Gray: Proc. Amer. Acad. Arts 7: 328. (1867) | ||||
Web links |
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