Equisetum x nelsonii (A.A.Eaton) J.H.Schaffn. (pro sp.)
Family: Equisetaceae
Nelson's horsetail, Nelson's scouring rush
[Equisetum nelsonii (A.A.Eaton) J.H.Schaffn.,  more...]
Etymology: Equisetum: Latin for "horsetail" from equus, "horse," and seta, "bristle"
Plants: perennial fern ally
Habitat: shores