[Wildflowers of the Columbia River Gorge of Oregon and Washington]

Horsetails of the Columbia River Gorge of Oregon and Washington

Equisitaceae

Ferriss' Horsetail, Ferriss' Scouring Rush: Equisetum xferrissii (Synonyms: Equisetum hyemale var. elatum, Equisetum hyemale var. intermedium, Equisetum hyemale x laevigatum, Equisetum intermedium)

Ferriss' scouring rush as seen in a road side ditch along the north side of old Highway 8 at Rowland Lake, western Klickitat County, WA.............May 20, 2011.

Common Horsetail, Field Horsetail: Equisetum arvense -

Swamp Horsetail, River Horsetail, Water Horsetail: Equisetum fluviatile (Synonym: Equisetum limosum) -

Common Scouring-rush, Common Scouring-rush, Scouring-rush Horsetail, Dutch Rush, Prairie Scouring-rush: Equisetum hyemale var. affine -

Smooth Scouring Rush: Equisetum laevigatum (Synonyms: Equisetum funstonii, Equisetum kansanum) -

Marsh Horsetail: Equisetum palustre -

Giant Horsetail, Great Horsetail: Equisetum telmateia var. braunii (Synonym: Equisetum maximum) -

Ferriss' Horsetail, Ferriss' Scouring Rush: Equisetum xferrissii (Synonyms: Equisetum hyemale var. elatum, Equisetum hyemale var. intermedium, Equisetum hyemale x laevigatum, Equisetum intermedium) -


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