Equisetum
horsetail, scouring-rush
Specimens
Photos
Origin: Native
Conservation Status: Not of concern
Description:
[none provided]
Accepted Name:
Equisetum
Publication: Sp. Pl. 2: 1061. 1753; Gen. Pl. ed. 5, 484, 1754.
Publication: Sp. Pl. 2: 1061. 1753; Gen. Pl. ed. 5, 484, 1754.
Synonyms & Misapplications:
(none provided)
Species in Equisetum:
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Equisetum arvense – common horsetail, field horsetail
Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across North America, except for the south-central and southeastern U.S., to the Atlantic Coast. -
Equisetum fluviatile – river horsetail, swamp horsetail, water horsetail Occurring on both sides of the Cascades crest in Washington; Alaska to Oregon, east to the northern Rocky Mountains and northern Great Plains, Great Lakes region, and northeastern North America.
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Equisetum hyemale – scouring rush horsetail , common scouring rush Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
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ssp. affine – common scouring rush, Dutch scouring rush, prairie scouring rush Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
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Equisetum laevigatum – smooth scouring rush 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.
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Equisetum palustre – marsh horsetail 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.
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Equisetum scirpoides – sedgelike horsetail, dwarf scouring rush Occurring east of the Cascades crest in northeastern Washington; Alaska to Washington, east across the northern U.S.and Canada to the Atlantic Coast; circumboreal.
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Equisetum sylvaticum – wood horsetail, woodland horsetail Occurring east of the Cascades crest in the northeastern counties in Washington; Alaska to Washington, east across southern Canada and the northern United States to the Atlantic Coast; circumboreal.
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Equisetum telmateia – giant horsetail Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to northern Idaho; Europe, northern Africa, and the Middle East.
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ssp. braunii – giant horsetail, great horsetail Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to northern Idaho.
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Equisetum variegatum – variegated horsetail, northern scouring rush Occurring chiefly east of the Cascades crest in Washington; Alaska to Oregon, east across southern Canada and the northern third of the United States to the Atlantic Coast; circumboreal.
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ssp. variegatum – variegated horsetail, northern scouring rush Occurring chiefly east of the Cascades crest in Washington; Alaska to Oregon, east across southern Canada and the northern third of the United States to the Atlantic Coast; circumboreal.
Additional Resources:
PNW Herbaria: Specimen records of Equisetum in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Equisetum checklist entry
OregonFlora: Equisetum information
E-Flora BC: Equisetum atlas page
CalPhotos: Equisetum photos
323 photographs:
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