Equisetum sylvaticum Linnaeus. Woodland Horsetail. Phen: Jul-Sep. Hab: Seepage swamps. Dist: Circumboreal, south in North America to MD, n. VA, ec. WV, OH, MI, WI, IA, WY, MT, and WA.

Origin/Endemic status: Native

Synonymy: = C, FNA2, FoC, GrPl, Il, K1, K3, K4, NE, NY, Pa, Va, Christenhusz et al (2019); > Equisetum sylvaticum L. var. multiramosum Wherry – Md, Tat, WV; > Equisetum sylvaticum L. var. pauciramosum Milde – F, G; > Equisetum sylvaticum L. var. sylvaticum – F, G

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