Ranunculus longirostris Godr.

Stems submersed, elongate, branched; lvs submersed, ternately or binately dissected into filiform segments, relatively firm, not collapsing when withdrawn from water, 1–2 cm, the free petiole none or much shorter than the expanded, pubescent stipular part; fls at the water-surface, white, 1–1.5 cm wide; stamens 10–20; achenes (7–)15–25, with a straight, slender beak 0.7–1.5 mm. Ponds and slow streams; sw. Que. to Del., Tenn., and Ala., w. to Sask., Ida., Nev. and Tex. May–July.