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

Common Horsetail, Field Horsetail

Equisetum arvense

Synonym: Equisetum arvense var. boreale

Common Horsetail, Field Horsetail: Equisetum arvense (Synonym: Equisetum arvense var. boreale)

Field horsetail emerging from spring foliage along the Eagle Creek Trail, Columbia River Gorge..........April 11, 2013.

Common Horsetail, Field Horsetail: Equisetum arvense (Synonym: Equisetum arvense var. boreale)

Vegetative (leafy) individual above and below left, reproductive individual below right.

Common Horsetail, Field Horsetail: Equisetum arvense (Synonym: Equisetum arvense var. boreale)Common Horsetail, Field Horsetail: Equisetum arvense (Synonym: Equisetum arvense var. boreale)
Paul Slichter