Ranunculus pallasii |
Ranunculus hydrocharoides |
|
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Pallas' buttercup, renoncule de Pallas |
frog's-bit buttercup, frogbit buttercup |
|
Roots | not thickened basally, glabrous. |
|
Stems | creeping or floating, rooting nodally, glabrous, not bulbous-based. |
erect to prostrate, usually rooting nodally, glabrous or strigose. |
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. |
|
Proximal cauline leaf blades | ovate to broadly ovate, 0.8-2.7 × 0.8-1.9 cm, base rounded to weakly cordate, margins entire or dentate, apex rounded or obtuse. |
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Inflorescences | bracts lanceolate to oblanceolate or sometimes ovate. |
|
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 5, spreading or reflexed from base, 1.5-3 × 1-2 mm, glabrous; petals 5-6, 3-5 × 1-2 mm; nectary scales glabrous. |
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. |
hemispheric or globose, 2-4 × 3-4 mm; achenes 1.2-1.4 × 1-1.2 mm, glabrous; beak lanceolate to lance-filiform, straight or curved, 0.4-1 mm. |
Tuberous | roots absent. |
|
2n | = 32. |
|
Ranunculus pallasii |
Ranunculus hydrocharoides |
|
Phenology | Flowering summer (Jul–Aug). | Flowering late spring–summer (Jun–Aug). |
Habitat | Shallow water of bogs and pools in muskeg and tundra | Wet soil or shallow water, in marshes and edges of streams and lakes |
Elevation | 0-700 m (0-2300 ft) | 2000-2900 m (6600-9500 ft) |
Distribution |
AK; MB; NF; NT; ON; QC; YT; Eurasia |
AZ; CA; NM; Mexico; Central America (in Guatemala)
|
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ranunculaceae > Ranunculus > subg. Pallasiantha | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Flammula |
Sibling taxa | ||
Synonyms | R. hydrocharoides var. stolonifer | |
Name authority | Schlechtendal: Animadv. Bot. Ranunc. Cand. 1: 15. (1819) | A. Gray: Mem. Amer. Acad. Arts, ser. 2, 5: 306. (1855) |
Web links |