Ranunculus adoneus |
Ranunculus pallasii |
|
---|---|---|
alpine buttercup |
Pallas' buttercup, renoncule de Pallas |
|
Roots | slender, 0.8-1.4 mm thick. |
|
Stems | erect from large caudices, 9-25 cm, glabrous, each with 1-3 flowers. |
creeping or floating, rooting nodally, glabrous, not bulbous-based. |
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. |
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 | 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. |
receptacle glabrous; sepals spreading, 6-10 × 4-7 mm, glabrous; petals 7-11, white or pink, 8-13 × 3-6 mm. |
Heads of achenes | 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. |
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. |
2 | n = 16. |
|
Tuberous | roots absent. |
|
2n | = 32. |
|
Ranunculus adoneus |
Ranunculus pallasii |
|
Phenology | Flowering summer (Jul–Aug). | |
Habitat | Spring-summer (May–Sep). Alpine and subalpine meadows, usually around melting snowbanks | Shallow water of bogs and pools in muskeg and tundra |
Elevation | 2500-4000 m (8200-13100 ft) | 0-700 m (0-2300 ft) |
Distribution |
CO; ID; MT; NV; UT; WY
|
AK; MB; NF; NT; ON; QC; YT; Eurasia |
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. Ranunculus > sect. Epirotes | Ranunculaceae > Ranunculus > subg. Pallasiantha |
Sibling taxa | ||
Synonyms | R. adoneus var. alpinus, R. eschscholtzii var. adoneus, R. eschscholtzii var. alpinus | |
Name authority | A. Gray: Proc. Acad. Nat. Sci. Philadelphia 15: 56. (1863) | Schlechtendal: Animadv. Bot. Ranunc. Cand. 1: 15. (1819) |
Web links |