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