[Horsetails: The Genus Equisetum in the Cascade Mountains of Oregon and Washington]

Common Horsetail, Field Horsetail

Equisetum arvense

Synonyms: Equisetum arvense var. alpestre, Equisetum arvense var. boreale, Equisetum arvense var. campestre, Equisetum arvense var. riparium, Equisetum calderi

Common horsetail on the gravelly shoreline of the South Fork Tieton River about one-half mile upstream of the junction with Conrad Creek, Wenatchee National Forest..........June 28, 2013.

Paul Slichter