Page author: Don Knoke
Equisetum variegatum
variegated horsetail, northern scouring-rush
WTU specimens
Other herbaria

Distribution: Alaska to Oregon, east across southern Canada and the northern third of the United States

Habitat: Wet places, sea level to alpine

Origin: Native

Conservation Status: Not of concern

Description:
General:

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.

Leaves:

None.

Spores:

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)
Infraspecies:
ssp. alaskanum – variegated horsetail, northern scouring-rush
ssp. variegatum – variegated horsetail, northern scouring-rush
Additional Resources:

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

WA Flora Checklist: Equisetum variegatum checklist entry.

E-Flora BC: Equisetum variegatum atlas page.

CalPhotos: Equisetum variegatum photos.

USDA Plants: Equisetum variegatum information.

10 photographs:
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