UW Burke Herbarium species comparison

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Equisetum hyemale

scouringrush horsetail , common scouring-rush
Habit Rhizomatous, evergreen perennial, the stems all alike, mostly unbranched, 2-15 dm. tall and 4-14 mm. thick, with 18-40 ridges, each ridge with 2 rows of tubercles; central cavity at least 3/4 the diameter of the stem; stomates in 2 lines in each furrow; sheaths 5-15 mm. long, black banded at the tip and also with a lower black band, ashy- gray between the black bands, green below the lower band.
Leaves

None
Spores

Cones short-pedunculate, 1-2.5 cm. long, sharp pointed.

Equisetum hyemale
Habitat Moist to wet areas, lowlands to moderate elevations in the mountains
Distribution
Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
Origin Native
Conservation status Not of concern
Sibling taxa
E. arvense, E. ×ferrissii, E. fluviatile, E. laevigatum, E. ×litorale, E. ×mackaii, E. ×nelsonii, E. palustre, E. scirpoides, E. sylvaticum, E. telmateia, E. variegatum
Subordinate taxa
E. hyemale ssp. affine
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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Choose a data source: Flora of North America, OregonFlora, UW Burke Herbarium

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