Equisetum laevigatum
smooth scouring rush

Distribution: Occurring chiefly east of the Cascades crest in Washngton; southern British Columbia to California, east to the Rocky Mountains, Great Plains, Great Lakes region, and northeastern North America.

Habitat: Wet places, including meadows and streambanks, at low to middle elevations.

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Rhizomatous perennial with stems lasting less than a year, sometimes overwintering in southwestern United States, typically unbranched, 2-15 dm. tall, with single lines of stomates and 10-32 ridges; sheaths green and elongate, 7-15 mm long and 3-9 mm bread; teeth 10-32, articulate and typically shedding early with dark rim on sheath remaining.




Cone tip rounded; spores green and spheric.

Accepted Name:
Equisetum laevigatum A. Braun
Publication: Amer. J. Sci. Arts. 46: 87. 1844.

Synonyms & Misapplications:
Equisetum funstonii A.A. Eaton [Peck]
Equisetum kansanum J.H. Schaffn. [Peck]
Additional Resources:

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

WA Flora Checklist: Equisetum laevigatum checklist entry

OregonFlora: Equisetum laevigatum information

E-Flora BC: Equisetum laevigatum atlas page

CalPhotos: Equisetum laevigatum photos

26 photographs:
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