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.

Paul Slichter