Page authors: Don Knoke, David Giblin
Equisetum palustre
marsh horsetail
Specimens
Photos

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across the northern U.S. and Canada to the Atlantic Coast; circumboreal.

Habitat: Streambanks, wet meadows, and marshes, from the lowlands to moderate elevations in the mountains.

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Description:
General:

Rhizomatous annual, the stems not dimorphic, 2-8 dm. tall, with 5 to 10 deep grooves, the ridges smooth; stomates in a single, broad band in each furrow; central cavity less than 1/3 the diameter of the stem; sheathes green, 5-10 mm. long, with persistent teeth 3-7 mm. long, black or dark brown with broad, pale, papery margins.

Leaves:

Branches few and irregular to many and whorled, 5- to 6-angled, simple.

Spores:

Cones pedunculate, blunt, deciduous.

Accepted Name:
Equisetum palustre L.
Publication: Sp. Pl. 2: 1061. 1753.

Synonyms & Misapplications:
Equisetum palustre L. var. americanum Vict.
Additional Resources:

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

WA Flora Checklist: Equisetum palustre checklist entry

OregonFlora: Equisetum palustre information

E-Flora BC: Equisetum palustre atlas page

CalPhotos: Equisetum palustre photos

20 photographs:
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