Ranunculus cooleyae |
Ranunculus triternatus |
|
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Cooley's buttercup |
Dalles Mountain buttercup, obscure buttercup |
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Roots | cylindric, 2-3 mm thick. |
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Stems | erect from short caudices, not rooting nodally, glabrous, not bulbous-based. |
prostrate or ascending, 5-20 cm, glabrous, each with 1-6 flowers. |
Basal leaves | blades circular to reniform in outline, 3-5-parted, 0.8-3.8 × 1.7-6.9 cm, segments again lobed, ultimate segments elliptic or oblong, margins crenate, apex rounded; cauline leaf 0-1, scalelike. |
persistent, blades rhombic to deltate or reniform in outline, 3-4x-dissected, 1.1-3.4 × 2-3.1 cm, segments linear, base obtuse, margins crenate, apices of segments narrowly rounded. |
Flowers | receptacle glabrous; sepals spreading, yellow, 7-11 × 4-7 mm, glabrous; petals 11-15, yellow, 8-12 × 3-5 mm. |
pedicels glabrous; receptacle short-pubescent; sepals 4-8 × 2-5 mm, abaxially glabrous or nearly so; petals 5, 6-15 × 4-10 mm; nectary scale glabrous. |
Heads of achenes | hemispheric or spheric, 7-8 × 9-10 mm; achenes 2.4-4.6 × 1.2-2.2 mm, glabrous; beak persistent, filiform, hooked distally, 1-1.8 mm. |
depressed-globose, 4-6 × 5-8 mm; achenes 1.8-2.2 × 1.2-1.8 mm, finely pubescent; beak subulate, straight, 0.8-1.5 mm. |
Tuberous | roots absent. |
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2n | = 16. |
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Ranunculus cooleyae |
Ranunculus triternatus |
|
Phenology | Flowering late spring–summer (Jun–Aug). | Flowering spring (Apr–May). |
Habitat | Slopes near persistent snowbanks | Grassland or sagebrush |
Elevation | 500-1800 m (1600-5900 ft) | 900-1700 m (3000-5600 ft) |
Distribution |
AK; WA; BC
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ID; NV; OR; WA
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Discussion | Of conservation concern. C. L. Hitchcock et al. (1955-1969, vol. 2) considered the name Ranunculus triternatus A. Gray to be an illegitemate homonym and used the illegitimate (superfluous) name R. reconditus A. Nelson & J. F. Macbride for this species. The name Ranunculus triternatus Poiret was not validly published (not accepted by Poiret) and does not invalidate R. triternatus A. Gray. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Ranunculus > subg. Cyrtorhyncha > sect. Arcteranthis | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes |
Sibling taxa | ||
Synonyms | Arcteranthis cooleyae, Kumlienia cooleyae | R. glaberrimus var. reconditus |
Name authority | Vasey & Rose ex Rose: Contr. U.S. Natl. Herb. 1: 289. (1894) | A. Gray: Proc. Amer. Acad. Arts 21: 370. (1886) |
Web links |