Equisetum praealtum Rafinesque. Tall Scouring-Rush, River Scouring-Rush. Phen: May-Sep. Hab: Riverbanks, alluvial floodplains. Dist: Widespread in North America south to s. Mexico and El Salvador.
Origin/Endemic status: Native
Syn: = Sf, Christenhusz et al (2019); = Equisetum hyemale ssp. affine – Ar, ETx1, FNA2, Il, Meso1, NE, NY, Tn, TxFerns, Va; = Equisetum hyemale var. affine – C, Fl1, GrPl, K1, K3, K4, Md, Mo1, Pa, RAB, Tx, W, WH3; > Equisetum hyemale var. affine – F, WV; > Equisetum hyemale var. elatum – G, WV; > Equisetum hyemale var. pseudohyemale – G; > Equisetum hyemale var. robustum – F
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© Richard & Teresa Ware