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

Horsetails of the Columbia River Gorge of Oregon and Washington

Equisitaceae

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 (Synonym: Equisetum arvense var. boreale) -

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

Common Scouring-rush, Common Scouring-rush, Dutch Rush, Prairie Scouring-rush, Scouring-rush Horsetail: Equisetum hyemale ssp. affine (Synonyms: Equisetum hyemale var. affine, Equisetum hyemale var. californicum, Equisetum praealtum) -

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

Marsh Horsetail: Equisetum palustre (Synonym: Equisetum paluste var. americanum) -

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

Northern Scouring Rush, Variegated Horsetail: Equisetum variegatum ssp. variegatum (Synonyms: Equisetum variegatum, Equisetum variegatum var. variegatum) -

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

Small Scouring Rush: Equisetum x mackaii (Synonyms: Equisetum hyemale var. mackaii, Equisetum trachyocon) -

Paul Slichter E-mail