Bloomer's buttercup, straight-beak buttercup, swamp buttercup
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Eschscholtz's buttercup, snow buttercup, subalpine buttercup
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sometimes fleshy and ± tuberous. |
slender, 0.4-1.6 mm thick. |
nearly erect or decumbent, never rooting nodally, hispid, strigose, or glabrous, base not bulbous. |
erect or decumbent from short or long caudices, 4-27 cm, glabrous, each with 1-3 flowers. |
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 reniform or cordate to obovate or broadly oblong, lobed or 3-parted, 0.5-4.1 × 0.8-3.7 cm, segments again 1(-2)×-lobed, base obtuse to cordate, apices of segments rounded in outline. |
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 4-8 × 2-6 mm, abaxially glabrous or pilose; petals 5-8, 6-16 × 4-16 mm; nectary scale glabrous. |
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. |
cylindric or ovoid, 5-10 × 4-7 mm; achenes 1.4-2 × 1-1.6 mm, glabrous or sparsely pubescent; beak lanceolate or subulate, straight (sometimes curved when immature), 0.6-1.8 mm. |
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AK; CA; ID; MT; NV; OR; UT; WA; WY; BC
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AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC; NT; YT
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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.) |
Varieties 6 (5 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
1. Basal leaves simple or 3-foliolate, if compound then leaflets undivided, margins crenate; petals retuse. | var. bloomeri |
1. Basal leaves 3–5-foliolate, leaflets lobed or parted, margins entire or dentate; petals truncate or rounded. | → 2 |
2. Heads of achenes hemispheric or sometimes globose, 5–7 mm; petals often abaxially red. | var. orthorhynchus |
2. Heads of achenes globose or ovoid, 8–13 mm; petals yellow. | var. platyphyllus |
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1. Ultimate segments and sinuses of basal leaves acute or acuminate. | → 2 |
1. Ultimate segments and sinuses of basal leaves rounded or obtuse (sometimes broadly rounded-acute). | → 3 |
2. Leaf blade reniform, base truncate or cordate. | var. suksdorfii |
2. Leaf blade obovate to broadly oblong, base obtuse or rounded. | var. eximius |
3. Middle segments of many basal leaves lobed and toothed or 2×-lobed. | var. trisectus |
3. Middle segments of basal leaves unlobed or 1×-lobed. | → 4 |
4. Caudices with few or no persistent leaf bases; basal leaves always 3-parted; widespread in w North America. | var. eschscholtzii |
4. Caudices densely clothed with persistent leaf bases; basal leaves sometimes parted but usually merely lobed; California and w Nevada. | var. oxynotus |
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FNA vol. 3. |
FNA vol. 3. |
Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Ranunculus |
Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Epirotes |
R. abortivus, R. acriformis, R. acris, R. adoneus, R. alismifolius, R. allegheniensis, R. allenii, R. ambigens, R. andersonii, R. aquatilis, R. arizonicus, R. arvensis, R. auricomus, R. austro-oreganus, R. bonariensis, R. bulbosus, R. californicus, R. canus, R. cardiophyllus, R. cooleyae, R. cymbalaria, R. eschscholtzii, R. fascicularis, R. fasciculatus, R. ficaria, R. flabellaris, R. flammula, R. gelidus, R. glaberrimus, R. glacialis, R. gmelinii, R. gormanii, R. harveyi, R. hebecarpus, R. hederaceus, R. hispidus, R. hydrocharoides, R. hyperboreus, R. hystriculus, R. inamoenus, R. jovis, R. kamtschaticus, R. lapponicus, R. laxicaulis, R. lobbii, R. macauleyi, R. macounii, R. macranthus, R. marginatus, R. micranthus, R. muricatus, R. nivalis, R. occidentalis, R. oresterus, R. pacificus, R. pallasii, R. parviflorus, R. pedatifidus, R. pensylvanicus, R. platensis, R. populago, R. pusillus, R. pygmaeus, R. ranunculinus, R. recurvatus, R. repens, R. rhomboideus, R. sabinei, R. sardous, R. sceleratus, R. sulphureus, R. testiculatus, R. trilobus, R. triternatus, R. turneri, R. uncinatus |
R. abortivus, R. acriformis, R. acris, R. adoneus, R. alismifolius, R. allegheniensis, R. allenii, R. ambigens, R. andersonii, R. aquatilis, R. arizonicus, R. arvensis, R. auricomus, R. austro-oreganus, R. bonariensis, R. bulbosus, R. californicus, R. canus, R. cardiophyllus, R. cooleyae, R. cymbalaria, R. fascicularis, R. fasciculatus, R. ficaria, R. flabellaris, R. flammula, R. gelidus, R. glaberrimus, R. glacialis, R. gmelinii, R. gormanii, R. harveyi, R. hebecarpus, R. hederaceus, R. hispidus, R. hydrocharoides, R. hyperboreus, R. hystriculus, R. inamoenus, R. jovis, R. kamtschaticus, R. lapponicus, R. laxicaulis, R. lobbii, R. macauleyi, R. macounii, R. macranthus, R. marginatus, R. micranthus, R. muricatus, R. nivalis, R. occidentalis, R. oresterus, R. orthorhynchus, R. pacificus, R. pallasii, R. parviflorus, R. pedatifidus, R. pensylvanicus, R. platensis, R. populago, R. pusillus, R. pygmaeus, R. ranunculinus, R. recurvatus, R. repens, R. rhomboideus, R. sabinei, R. sardous, R. sceleratus, R. sulphureus, R. testiculatus, R. trilobus, R. triternatus, R. turneri, R. uncinatus |
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Hooker: Fl. Bor.-Amer. 1: 21. (1829) |
Schlechtendal: Animadv. Bot. Ranunc. Cand. 2: 16. (1820) |
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