Ranunculus cooleyae |
Ranunculus hystriculus |
|
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Cooley's buttercup |
waterfall false buttercup |
|
Stems | erect from short caudices, not rooting nodally, glabrous, not bulbous-based. |
erect from short caudices, not rooting nodally, glabrous, not bulbous-based. |
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. |
|
Basal leaf | 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. |
|
Flowers | receptacle glabrous; sepals spreading, yellow, 7-11 × 4-7 mm, glabrous; petals 11-15, yellow, 8-12 × 3-5 mm. |
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. |
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. |
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. |
Tuberous | roots absent. |
roots absent. |
2n | = 16. |
|
Ranunculus cooleyae |
Ranunculus hystriculus |
|
Phenology | Flowering late spring–summer (Jun–Aug). | Flowering winter–summer (Feb–Jul). |
Habitat | Slopes near persistent snowbanks | Wet places near streams, especially around waterfalls |
Elevation | 500-1800 m (1600-5900 ft) | 300-2300 m (1000-7500 ft) |
Distribution |
AK; WA; BC
|
CA
|
Discussion | Ranunculus hystriculus is endemic to the west slope of the Sierra Nevada. (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. Cyrtorhyncha > sect. Pseudaphanostemma |
Sibling taxa | ||
Synonyms | Arcteranthis cooleyae, Kumlienia cooleyae | Kumlienia hystriculus |
Name authority | Vasey & Rose ex Rose: Contr. U.S. Natl. Herb. 1: 289. (1894) | A. Gray: Proc. Amer. Acad. Arts 7: 328. (1867) |
Web links |