Ranunculus pallasii |
Ranunculus testiculatus |
|
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Pallas' buttercup, renoncule de Pallas |
bur buttercup, hornseed buttercup, tubercled crowfoot |
|
Stems | creeping or floating, rooting nodally, glabrous, not bulbous-based. |
erect or ascending, not rooting nodally, villous, not bulbous-based. |
Basal leaf blades | linear to obovate, undivided or 3-lobed, 1.5-3.6 × 0.3-2 cm, lobes lanceolate or elliptic, margins entire, apex rounded to acuminate. |
broadly spatulate in outline, 1-2x-dissected, 0.9-3.8 × 0.5-1.5 cm, segments linear, margins entire, apex obtuse to acuminate. |
Flowers | receptacle glabrous; sepals spreading, 6-10 × 4-7 mm, glabrous; petals 7-11, white or pink, 8-13 × 3-6 mm. |
receptacle glabrous; sepals spreading, 3-6 × 1-2 mm, villous; petals yellow, 3-5 × 1-3 mm. |
Heads of achenes | globose or hemispheric, 5-12 × 9-15 mm; achenes 4.2-5.2 × 2.4-3.2 mm, glabrous; beak persistent, lanceolate, straight or curved, 1-1.2 mm. |
cylindric, 9-16(-27) × 8-10 mm; achenes 1.6-2 × 1.8-2 mm, tomentose; beak persistent, lanceolate, 3.5-4.5 mm. |
Tuberous | roots absent. |
roots absent. |
2n | = 32. |
|
Ranunculus pallasii |
Ranunculus testiculatus |
|
Phenology | Flowering summer (Jul–Aug). | Flowering spring (Apr–May). |
Habitat | Shallow water of bogs and pools in muskeg and tundra | Disturbed areas, especially in grassland |
Elevation | 0-700 m (0-2300 ft) | 400-2500 m (1300-8200 ft) |
Distribution |
AK; MB; NF; NT; ON; QC; YT; Eurasia |
AZ; CA; CO; IA; ID; KS; MN; MO; MT; ND; NE; NM; NV; OH; OR; SD; UT; WA; WY; BC; SK; native to Eurasia [Introduced in North America]
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Discussion | In North America, Ranunculus testiculatus seems to be expanding its range rapidly in arid and semiarid areas. A second species of this subgenus, R. falcatus Linnaeus [Ceratocephala falcata (Linnaeus) Persoon], has been reported from North America, but all reports seem to be based on misidentified material of R. testiculatus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Ranunculus > subg. Pallasiantha | Ranunculaceae > Ranunculus > subg. Ceratocephala |
Sibling taxa | ||
Synonyms | Ceratocephalus orthoceras, Ceratocephalus testiculatus | |
Name authority | Schlechtendal: Animadv. Bot. Ranunc. Cand. 1: 15. (1819) | Crantz: Stirp. Austr. Fasc. 2: 97. (1763) |
Web links |