• 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.

Did You Know?

White Penstemon

White Penstemon is the most widespread penstemon or beardtongue in the Great Plains. The insides of the blossoms are bearded and often spotted with purple. More...