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

[Horsetails East of the Cascade Mountains of Oregon and Washington]

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 at a spring along the Canyon Mountain Trail #218, Strawberry Wilderness.............August 1, 2011.

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 along Rock Creek at the Escure Ranch, western Whitman County, WA.............May 16, 2011.

Ferris' scouring rush as seen along southern Douglas Creek, Douglas County, Washington...........June 3, 2013.

Paul Slichter