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
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Washington Native Plant Society
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