common water plantain buttercup, kidney-leaf buttercup, plantain-leaf buttercup, water-plantain buttercup
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corn buttercup, devil-on-all-sides, field buttercup, hungerweed
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slender or fusiform-thickened basally, glabrous. |
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erect or ascending, not rooting nodally, glabrous or hirsute. |
erect or ascending, sparsely pilose. |
basal leaf blades with base acute; proximal cauline leaf blades lanceolate, ovate, or elliptic, 1.8-14.1 × 0.7-2.9 cm, base acuminate to rounded, margins entire or serrulate, apex obtuse to acuminate. |
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bracts lanceolate. |
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receptacle glabrous; sepals 5, spreading or reflexed from base, 2-6 × 1-4 mm, glabrous or hirsute; petals 5-12, 5-14 × 2-8 mm; nectary scales glabrous. |
pedicellate; receptacle sparsely hispid; sepals 5, spreading, 4-7 × 1-2 mm, strigose; petals 5, 5-8 × 2-4 mm. |
hemispheric to globose, 3-7 × 4-8 mm; achenes 1.6-2.8 × 1.2-2 mm, glabrous or rarely hispid; beak lance-subulate, straight or weakly curved, 0.4-1.2 mm. |
discoid, 8-9 mm across; achenes 5-8 per head, 4-6.4 × 2.8-4.4 mm, faces and margin covered with long spines, glabrous; beak lance-subulate, straight, 1.6-3.8 mm. |
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and lower cauline leaf blades obovate to rhombic in outline, 3-parted or 3(-5)-foliolate, 1.8-5.2 × 1.6-4.2 cm, leaflets oblanceolate or divided into oblanceolate or linear segments, leaflet base narrowly acuminate, margins entire or distally dentate, apex rounded or acuminate. |
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Flowering spring (Mar–Jun). |
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Grasslands, ephemeral pools, disturbed areas |
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0-1200 m (0-3900 ft) |
CA; CO; ID; MT; NV; OR; UT; WA; WY; BC
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AR; CA; DC; GA; ID; IL; KS; LA; MO; MS; NC; NJ; NY; OR; PA; SC; TN; UT; WA; South America; native to Eurasia; Pacific Islands; Australia [Introduced in North America]
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Varieties 6 (6 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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1. Petals 7–12 on most flowers, 2–3 mm broad. | var. montanus |
1. Petals 4–6(–8), 2–8 mm broad. | → 2 |
2. Stems 3.5–8 mm thick; leaf margins serrulate. | var. alismifolius |
2. Stems 1–3 mm thick; leaf margins entire. | → 3 |
3. Leaf blades ovate or elliptic. | var. alismellus |
3. Leaf blades broadly to narrowly lanceolate. | → 4 |
4. Petals 10–14 mm; California and Nevada. | var. lemmonii |
4. Petals 5–8 mm; widespread. | → 5 |
5. Roots fusiform-thickened proximally; stems and petioles glabrous or pubescent. | var. davisii |
5. Roots not or scarcely fusiform-thickened proximally; stems and petioles glabrous. | var. hartwegii |
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FNA vol. 3. |
FNA vol. 3. |
Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Flammula |
Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Echinella |
R. abortivus, R. acriformis, R. acris, R. adoneus, 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. 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 |
R. abortivus, R. acriformis, R. acris, R. adoneus, R. alismifolius, R. allegheniensis, R. allenii, R. ambigens, R. andersonii, R. aquatilis, R. arizonicus, 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. 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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R. arvensis var. tuberculatus |
Geyer ex Bentham: Pl. Hartw., 295. (1849) |
Linnaeus: Sp. Pl. 1: 555. (1753) |
| - Local floras: BC, CA, OR, WA
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