Ranunculus orthorhynchus |
Ranunculus jovis |
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Bloomer's buttercup, straight-beak buttercup, swamp buttercup |
Utah buttercup |
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Roots | sometimes fleshy and ± tuberous. |
tuberous, 2.5-5 mm thick. |
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Stems | nearly erect or decumbent, never rooting nodally, hispid, strigose, or glabrous, base not bulbous. |
erect, 2.5-7.5 cm, glabrous, each with 1-4 flowers. |
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Basal leaves | blades narrowly ovate to oblong or semicircular in outline, simple to 3-5-lobed or -foliolate, 2.8-12.5 × 2.5-14 cm, leaflets or segments undivided or 1-2x-lobed or -parted, ultimate segments circular to linear, margins dentate, crenate, or entire, apex rounded to narrowly 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. |
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Flowers | receptacle hispid; sepals reflexed 1-2 mm above base, 5-11 × 2-4 mm, hispid, hirsute, or glabrous; petals 5-6, abaxially yellow or red, adaxially yellow, 8-18 × 4-11 mm. |
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. |
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Heads of achenes | hemispheric to ovoid, 5-13 × 6-10 mm; achenes 2.8-4.5 × 1.8-3.2 mm, glabrous, margin forming narrow rib 0.1-0.2 mm wide; beak persistent, narrowly lanceolate to subulate, straight, 1.8-3.8(-4.8) 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. |
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Ranunculus orthorhynchus |
Ranunculus jovis |
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Phenology | Flowering spring–summer (Apr–Jul). | |||||||||
Habitat | Dry, open slopes, often around persistent snowbanks | |||||||||
Elevation | 1700-3000 m (5600-9800 ft) | |||||||||
Distribution |
AK; CA; ID; MT; NV; OR; UT; WA; WY; BC
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CO; ID; MT; NV; UT; WY
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Discussion | Varieties 3 The first two varieties (Ranunculus orthorhynchus var. orthorhynchus and R. orthorhynchus var. platyphyllus) are rather weak, intergrading extensively in California and Oregon. By contrast, R. orthorhynchus var. bloomeri often grows with the others with little or no intergradation (although intermediate populations are found in some areas), and it has been treated as a distinct species, R. bloomeri, by many taxonomists. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 3. | FNA vol. 3. | ||||||||
Parent taxa | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Ranunculus | Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Name authority | Hooker: Fl. Bor.-Amer. 1: 21. (1829) | A. Nelson: Bull. Torrey Bot. Club 27: 261. (1900) | ||||||||
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