Ranunculus pallasii |
Ranunculus adoneus |
|
---|---|---|
Pallas' buttercup, renoncule de Pallas |
alpine buttercup |
|
Roots | slender, 0.8-1.4 mm thick. |
|
Stems | creeping or floating, rooting nodally, glabrous, not bulbous-based. |
erect from large caudices, 9-25 cm, glabrous, each with 1-3 flowers. |
Basal leaves | persistent, blades circular to reniform in outline, 2-3x-dissected into linear segments, 0.9-2.5 × 1.1-2.8 cm, base obtuse, margins entire, apices of segments narrowly rounded to acute. |
|
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. |
|
Flowers | receptacle glabrous; sepals spreading, 6-10 × 4-7 mm, glabrous; petals 7-11, white or pink, 8-13 × 3-6 mm. |
pedicels glabrous; receptacle glabrous; sepals 4-11 × 3-7 mm, abaxially sparsely pilose, hairs colorless; petals 5-10, 8-15 × 8-19 mm; nectary scale 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. |
ovoid, 6-12 × 5-9 mm; achenes 1.8-2.4 × 1-1.4 mm, glabrous or nearly so; beak subulate, straight, 1.2-1.7 mm. |
Tuberous | roots absent. |
|
2 | n = 16. |
|
2n | = 32. |
|
Ranunculus pallasii |
Ranunculus adoneus |
|
Phenology | Flowering summer (Jul–Aug). | |
Habitat | Shallow water of bogs and pools in muskeg and tundra | Spring-summer (May–Sep). Alpine and subalpine meadows, usually around melting snowbanks |
Elevation | 0-700 m (0-2300 ft) | 2500-4000 m (8200-13100 ft) |
Distribution |
AK; MB; NF; NT; ON; QC; YT; Eurasia |
CO; ID; MT; NV; UT; WY
|
Discussion | Most collections of Ranunculus adoneus from Colorado, including the type specimen, tend to be small, with narrow leaf segments (only 0.5-1 mm wide) and large flowers. The more widespread form, with leaf segments 1-2 mm wide and more variable flowers, has been called R. adoneus var. alpinus. The leaf and flower characteristics are very poorly correlated, however, and specimens referable to var. alpinus vary greatly in stature and flower size, so the two forms scarcely merit formal recognition. (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. Ranunculus > sect. Epirotes |
Sibling taxa | ||
Synonyms | R. adoneus var. alpinus, R. eschscholtzii var. adoneus, R. eschscholtzii var. alpinus | |
Name authority | Schlechtendal: Animadv. Bot. Ranunc. Cand. 1: 15. (1819) | A. Gray: Proc. Acad. Nat. Sci. Philadelphia 15: 56. (1863) |
Web links |