Page author: Don Knoke
Equisetum palustre
marsh horsetail

Distribution: Circumboreal, south south in North America to southern Washington, northern Idaho, Nebraska and Pennsylvania.

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

Origin: Native

Conservation Status: Not of concern


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.


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


Cones pedunculate, blunt, deciduous.

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

E-Flora BC: Equisetum palustre atlas page.

CalPhotos: Equisetum palustre photos.

USDA Plants: Equisetum palustre information.

13 photographs:
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