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Carter's buttercup

Gmelin's buttercup, Gmelin's water buttercup, lesser yellow water crowfoot, renoncule de Gmelin, small yellow water-buttercup, yellow water crowfoot

Stems

prostrate or sometimes floating, glabrous or hirsute, rooting nodally.

Leaves

basal leaves absent, cauline leaf blades reniform to circular, 3-parted, 0.6-6.5 × 1.1-9 cm, base cordate, segments again 1-3x-lobed to -dissected, margins entire or crenate, apex rounded to filiform.

Flowers

receptacle sparsely hispid;

sepals 4-5, spreading or reflexed from base, 2-5 × 2-4 mm, glabrous or sparsely pilose;

petals 4-14, 3-7 × 2-5 mm;

nectary scale variable, crescent-shaped, funnel-shaped, or flaplike;

style 0.2-0.4 mm.

Heads of achenes

globose or ovoid, 3-8 × 3-7 mm;

achenes 1-1.6 × 1-1.2 mm, glabrous;

beak narrowly lanceolate or filiform, 0.4-0.8 mm.

2n

= 16, 32, 64.

Ranunculus bonariensis

Ranunculus gmelinii

Phenology Flowering spring–summer (May–Sep).
Habitat Shallow water or drying mud, wet meadows, swamps, marshes, ponds, shores of rivers
Elevation 0-2800 m (0-9200 ft)
Distribution
from FNA
CA; temperate South America
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; CO; IA; ID; IL; ME; MI; MN; MT; ND; NM; NV; OR; UT; WA; WI; WY; AB; BC; MB; NB; NF; NS; NT; ON; PE; QC; SK; YT; Eurasia
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 3 (1 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Ranunculus gmelinii has been divided into varieties on the basis of indument and flower size. These characters are variable and poorly correlated with one another, however, and these varieties scarcely seem natural.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 3. FNA vol. 3.
Parent taxa Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Flammula Ranunculaceae > Ranunculus > subg. Ranunculus > sect. Hecatonia
Sibling taxa
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. 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. 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. 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
Subordinate taxa
R. bonariensis var. trisepalus
Synonyms R. gmelinii subsp. purshii, R. gmelinii var. hookeri, R. gmelinii var. limosus, R. gmelinii var. prolificus, R. purshii
Name authority Poiret: in J. Lamarck et al., Encycl. 6: 102. (1804) de Candolle: Syst. Nat. 1: 303. (1817)
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