Ranunculus repens L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Hirsute to strigose or subglabrous perennial, mostly creeping, rarely ascending or erect; lvs petioled, 3-parted, the terminal segment stalked, all segments broadly obovate to subrotund, cleft or lobed, sharply toothed; pet 8–15 mm, two-thirds as wide; anthers 1–2 mm; achenes broadly and obliquely ovate, 2.5–3.5 mm, sharply but narrowly margined, the beak triangular, usually curved, 0.8–1.5 mm; 2n mostly =32. Native of Europe, naturalized in fields, lawns, roadsides, and wet meadows. May–July. Robust, subglabrate plants have been called var. glabratus DC., and double- flowered ones have been called var. degeneratus Schur or var. pleniflorus Fernald.