Equisetum fluviatile Linnaeus. Phen: Jun-Aug. Hab: Open calcareous wetlands, wet meadows, river and lake margins. Dist: Circumboreal, south in North America to n. VA, n. WV, PA, OH, IN, IL, IA, and WA.
Origin/Endemic status: Native
Syn: = C, F, FNA2, G, GrPl, Il, K1, K3, K4, Md, NE, NY, Pa, Va, W, WV, Christenhusz et al (2019)