E-Flora BC: Electronic Atlas of the Flora of British Columbia

Equisetum variegatum subsp. alaskanum Schleich. ex F. Weber & D. Mohr (A.A. Eaton) Hulten
northern scouring-rush
Equisetaceae (Horsetail family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #6940)

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Distribution of Equisetum variegatum subsp. alaskanum
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Species Information

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Perennial evergreen from a branched, shiny, blackish rhizome.
10-50 cm tall, 1-3 mm thick, their central cavity 1/4 the stem diameter, unbranched, the sheaths with 3-14 teeth.
5-7 mm long, pointed at the tip.
A hybrid with E. hyemale (E. x trachyodon A. Braun) was collected on the Queen Charlotte Islands (Calder & Taylor 1968). A hybrid with E. laevigatum (E. x nelsonii [A. A. Eaton] Schaffn.) has not been reported from BC, but can be expected.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet lake shores, streambanks, fens, meadows, clearings and roadsides from the lowland and steppe to subalpine and (rarely) alpine zones; frequent in coastal (ssp. alaskanum) and interior BC (ssp. variegatum); circumpolar, N to AK, E to NF and S to NH, CT, PA, MI, MN, WY, CO, UT, ID and OR; Eurasia.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Equisetum variegatum var. alaskanum A.A. Eaton

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References