[Wildflowers of the Cascade Mountains of Oregon and Washington]

Horsetails of the Cascade Mountains of Oregon and Washington

Equisetaceae

Common Horsetail, Field Horsetail: Equisetum arvense (Synonyms: Equisetum arvense var. alpestre, Equisetum arvense var. boreale, Equisetum arvense var. campestre, Equisetum arvense var. riparium, Equisetum calderi) -

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

River Horsetail, Swamp Horsetail, Water Horsetail: Equisetum fluviatile (Synonyms: Equisetum fluviatile var. limosum, Equisetum limosum) -

Common Scouring-rush, Common Scouring-rush, Scouring-rush Horsetail, Dutch Rush, Prairie Scouring-rush: Equisetum hyemale var. affine (Synonyms: Equisetum affine, Equisetum hyemale ssp. affine, Equisetum hyemale var. californicum, Equisetum hyemale var. pseudohyemale, Equisetum hyemale var. robustum, Equisetum praealtum, Equisetum robustum, Hippochaete hyemalis, Hippochaete hemalis ssp. affinis) -

Smooth Scouring Rush: Equisetum laevigatum (Synonyms: Equisetum funstonii, Equisetum kansanum, Equisetum laevigatum ssp. funstonii, Hippochaete laevigata) -

Marsh Horsetail: Equisetum palustre (Synonyms: Equisetum palustre var. americanum, Equisetum palustre var. simplicissimum)-

Wood Horsetail, Woodland Horsetail: Equisetum sylvaticum (Synonyms: Equisetum sylvaticum var. multiramosum, Equisetum sylvaticum var. pauciramosum) -

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