Equisetum hyemale var. affine (Engelm.) A.A. Eaton
Equisetaceae
R. G. Stolze
517
1965-06-25 - 1965-06-27
1965-6-25
United States, Wyoming, Big Horn Mountains - Washakie County. Tensleep Canyon; limestone slopes and cliffs rising from creek, adjacent to Ten-sleep Creek Campground, off U.S. Route 16, 9 miles east of Tensleep.