Ranunculus hydrocharoides var. stolonifer (Hemsley) L. D. Benson

Stems erect to prostrate, usually rooting nodally, glabrous or strigose. Roots not thickened basally, glabrous. Proximal cauline leaf blades ovate to broadly ovate, 0.8-2.7 × 0.8-1.9 cm, base rounded to weakly cordate, margins entire or dentate, apex rounded or obtuse. Inflorescences: bracts lanceolate to oblanceolate or sometimes ovate. Flowers: receptacle glabrous; sepals 5, spreading or reflexed from base, 1.5-3 × 1-2 mm, glabrous; petals 5-6, 3-5 × 1-2 mm; nectary scales glabrous. Heads of achenes hemispheric or globose, 2-4 × 3-4 mm; achenes 1.2-1.4 × 1-1.2 mm, glabrous; beak lanceolate to lance-filiform, straight or curved, 0.4-1 mm.

Flowering late spring-summer (Jun-Aug). Wet soil or shallow water, in marshes and edges of streams and lakes; 2000-2900 m; Ariz., Calif., N.Mex.; Mexico; Central America (in Guatemala).