Page author: Don Knoke
Equisetum hyemale
scouringrush horsetail , common scouring-rush

Distribution: Circumboreal; throughout the Pacific Northwest

Habitat: Moist to wet areas, lowlands to moderate elevations in the mountains

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Rhizomatous, evergreen perennial, the stems all alike, mostly unbranched, 2-15 dm. tall and 4-14 mm. thick, with 18-40 ridges, each ridge with 2 rows of tubercles; central cavity at least 3/4 the diameter of the stem; stomates in 2 lines in each furrow; sheaths 5-15 mm. long, black banded at the tip and also with a lower black band, ashy- gray between the black bands, green below the lower band.




Cones short-pedunculate, 1-2.5 cm. long, sharp pointed.

Accepted Name:
Equisetum hyemale L.
Publication: Sp. Pl. 2: 1062. 1753.

Synonyms & Misapplications:
(none provided)
ssp. affine – common scouring rush, Dutch rush, prairie scouring rush
Additional Resources:

PNW Herbaria: Specimen records of Equisetum hyemale in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Equisetum hyemale checklist entry.

E-Flora BC: Equisetum hyemale atlas page.

CalPhotos: Equisetum hyemale photos.

USDA Plants: Equisetum hyemale information.

36 photographs:
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