Vascular Plants - Equisetaceae - Equisetum:
Equisetum scirpoides
Page Author: Don Knoke
dwarf scouring-rush, sedgelike horsetail 
Habit: herb
Duration: perennial
Origin: Native
Distribution: Circumboreal, south in North America to northeast Washington, east to northwest Montana, Minnisota, and New York.
Habitat: Moist, swampy places, especially in coniferous forests.
Species Description:

General: Rhizomatous, evergreen perennial, the stems all alike, prostrate or ascending, firm, 0.7-2.5 dm. tall and 0.5-1 mm. thick, 6-grooved and angled, alternating grooves shallower and deeper; stomates in two rows in each principal furrow, sunken below the level of the epidermis; central cavity none; sheaths short and flaring, with a broad, black band above the green base; teeth of the sheath 3, thin and fragile, bristle-tipped, 1-2 mm. long.
Leaves: Unbranched, or with a few long branches from near the base.
Spores: Cone small, 3-5 mm. long, sub-sessile, sharp pointed.
Accepted Name:
Equisetum scirpoides Michx.
Synonyms:
(none)

Treated in Flora of the PNW as:
Equisetum scirpoides
Additional Resources:

PNW Herbaria Specimens: View list of all Equisetum scirpoides specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Equisetum scirpoides specimens in the WTU Herbarium database.

Washington Flora Checklist: Equisetum scirpoides treatment.

E-Flora BC: Equisetum scirpoides atlas page.

CalPhotos: Equisetum scirpoides images.

USDA Plants Database: Equisetum scirpoides.
Additional photographs of Equisetum scirpoides:
(click on a thumbnail to view larger photo)

Ben Legler, 2005

Ben Legler, 2005

Ben Legler, 2005

Ben Legler, 2005

Ben Legler, 2005

Ben Legler, 2005

Ben Legler, 2005

Craig Althen, 2012

Craig Althen, 2012

Craig Althen, 2012
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Washington Native Plant Society
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