Ranunculus adoneus |
Ranunculus jovis |
|
---|---|---|
alpine buttercup |
Utah buttercup |
|
Roots | slender, 0.8-1.4 mm thick. |
tuberous, 2.5-5 mm thick. |
Stems | erect from large caudices, 9-25 cm, glabrous, each with 1-3 flowers. |
erect, 2.5-7.5 cm, glabrous, each with 1-4 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. |
persistent, blades obdeltate in outline, 1-2.8 cm, segments 0.2-0.6 cm wide, deeply divided into 3 oblanceolate segments with lateral segments often again lobed or parted, base long-attenuate, margins entire, apex rounded. |
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. |
pedicels glabrous; receptacle glabrous or sparsely pilose; sepals 3-7 × 1.5-3 mm, abaxially glabrous; petals 5, 6-12 × 2-5 mm; nectary scale glabrous. |
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 to cylindric, 3.5-8 × 3-7 mm; achenes 1.1-1.4 × 0.8-1.1 mm, finely pubescent; beak subulate, straight, 0.2-0.8 mm. |
2 | n = 16. |
|
Ranunculus adoneus |
Ranunculus jovis |
|
Phenology | Flowering spring–summer (Apr–Jul). | |
Habitat | Spring-summer (May–Sep). Alpine and subalpine meadows, usually around melting snowbanks | Dry, open slopes, often around persistent snowbanks |
Elevation | 2500-4000 m (8200-13100 ft) | 1700-3000 m (5600-9800 ft) |
Distribution |
CO; ID; MT; NV; UT; WY
|
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. Ranunculus > sect. Epirotes | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes |
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) | A. Nelson: Bull. Torrey Bot. Club 27: 261. (1900) |
Web links |