Page authors: Don Knoke, David Giblin
Equisetum variegatum
variegated horsetail, northern scouring rush

Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to Oregon, east across southern Canada and the northern third of the United States to the Atlantic Coast; circumboreal.

Habitat: Wet places, from sea level to alpine.

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Stems evergreen, perennial, from black, smooth rhizomes, all alike, ascending or erect, 1-3 dm. tall and 1-2 mm. thick, branched near the base; stems 5-to 12-ridged, the ridges very shallow; stomates in 2 rows in each furrow, sunken below the level of the epidermis; central cavity 1/4 to 1/3 the diameter of the stem; sheaths 2-4 mm. long, green with black tips, the teeth with conspicuous white margins, abruptly contracted to a hair-like tip.




Cones small, up to 1 cm. long, sharp pointed.

Accepted Name:
Equisetum variegatum Schleich. ex F. Weber & D. Mohr
Publication: Bot. Taschenb. 60, 447. 1807.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

WA Flora Checklist: Equisetum variegatum checklist entry

OregonFlora: Equisetum variegatum information

E-Flora BC: Equisetum variegatum atlas page

CalPhotos: Equisetum variegatum photos

17 photographs:
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