• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Horsetails - Smooth Scouring Rush

Smooth Scouring Rush - Equisetum laevigatum
Smooth Scouring Rush, Smooth Horsetail - Equisetum laevigatum
NPS Photo by Jim Pisarowicz
Smooth Scouring Rush derives its name because early seetlers and Indians used them for scouring and polishing. Their grittiness comes from the high silica content of their cells.

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