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Scouringrush Horsetail Back to Plant Page
Equisetum hyemale ssp. affine

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About Scouringrush Horsetail (Equisetum hyemale ssp. affine) Scouringrush Horsetail (Equisetum hyemale ssp. affine) is a native fern that grows in Northern, Southern and Central California, primarily in the Warner Mountains and White and Inyo Mountain regions. It tends to grow in streams and moist, sandy or gravelly places, at elevations from 0-9800 feet.
Plant Description
Plant Type

Max. Height
7 ft (2.1 m)

Native Status

Natural Setting
Site Type
Streams, moist, sandy or gravelly places


Elevation ?
-7' - 9369'

Annual Precip. ?
2.8" - 89.1"

Summer Precip. ?
0.14" - 2.84"

Coldest Month ?
24.3° F - 61.3° F

Hottest Month ?
46.5° F - 88.7° F

Humidity ?
0.09 vpd - 42.78 vpd

Soil Description
Tolerant of a variety of soils as long as sufficient moisture is available

Fast, Medium, Slow

Sunset Zones ?
1*, 2*, 3*, 4*, 5*, 6*, 7*, 8, 9, 14*, 15*, 16*, 17*, 18, 19, 20, 21, 22*, 23*, 24*

Landscaping Information
Water Requirement ?
Low, Moderate - High
Extremely Low
Very Low
Moderate - High

Common uses
Bogs and Ponds, Bird Gardens

Nursery Availability
Sometimes Available

Other Names
Botanical Names
Equisetum hyemale var. affine

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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