Stems 7-35 cm × 1-3 mm, glabrous or pilose. Roots often distinctly fusiform-thickened proximally. Leaves: petiole glabrous or pilose. Leaf blade narrowly lanceolate, 2.7-10.8 × 0.6-1.3 cm, base acuminate, margins entire. Flowers: petals 5-6(-8), 10-14 × (3-)5-8 mm.

Flowering spring-summer (May-Jul). Meadows; 1400-2900 m; Calif., Nev.

Ranunculus alismifolius var. lemmonii is endemic to the Sierra Nevada.