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

Equisetum laevigatum A. Braun
smooth scouring-rush (smooth horsetail)
Equisetaceae (Horsetail family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #3811)

E-Flora BC Static Map
Distribution of Equisetum laevigatum
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Species Information

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Perennial from a rhizome.
20-120 cm tall, 3-8 mm thick, light green, their central cavity 2/3-3/4 the stem diameter, unbranched, the sheaths with 12-30 teeth that fall off leaving only small depressions at the sheath tips.
8-15 mm long, with a blunt or rounded tip.
A hybrid with E. hyemale (E. x ferrissii Clute) occurs infrequently in SC BC.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blooming Period:
Early Spring
Fruit/Seed characteristics:
Colour: Brown
Present from Spring to Summer
Source:  The USDA

Habitat / Range

Dry to moist sandy soil, wet margins of lakes, streambanks, roadsides in the steppe and montane zones; frequent in SC and SE BC; E to ON and S to OH, IL, OK, TX, NM, AZ and CA; Mexico.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Equisetum laevigatum

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 451 1073 2130
Slope Gradient (%) 0 8 40
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
158 232 320
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 4 7
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: AT(1), ESSF(1), ICH(1), IDF(3), PP(2)


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 cool temperate & cool mesothermal.

Synonyms and Alternate Names

Equisetum funstonii A.A. Eat.
Equisetum kansanum Schaffn.
Equisetum laevigatum subsp. funstonii (A.A. Eat.) Hartman
Hippochaete laevigata (A. Braun) Farw.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References