Much like no. 5 [Ranunculus pensylvanicus L.f.], but sometimes glabrous, the stems widely branched and sometimes rooting from the lower nodes; pet 3.5–5 mm, equaling or commonly longer than the sep; fruiting heads mostly 7–12 mm, ovoid-cylindric; achenes 2.7–3.3 mm; beak triangular-subulate, 0.8–1.8 mm; 2n=32. Marshes and wet meadows; Lab. to Alas. and e. Asia, s. to Que., n. Mich., Io., and Ariz. June–Aug.