UW Burke Herbarium species comparison

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Equisetum palustre

marsh horsetail
Habit 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.

Equisetum palustre
Habitat Streambanks, wet meadows, and marshes, from the lowlands to moderate elevations in the mountains.
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.
[WildflowerSearch map]
[BONAP county map]
Origin Native
Conservation status Not of concern
Sibling taxa
E. arvense, E. ×ferrissii, E. fluviatile, E. hyemale, E. laevigatum, E. ×litorale, E. ×mackaii, E. ×nelsonii, E. scirpoides, E. sylvaticum, E. telmateia, E. variegatum
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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