Equisetum hyemale var. affine (Engelm.) A.A. Eaton
Equisetaceae
R. G. Stolze
868
1966-06-18
1966-6-18
United States, Wyoming, Beartooth Mountains - Park County. Granite slopes in pine-spruce forest along U.S. Route 212 near Crazy Creek, 13 miles southeast of Cooke City, Montana