Equisetum species

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Scientific Name Equisetum hymale ssp. affine USDA PLANTS Symbol
EQHYA
Common Name Common Scouring-rush, Scouring-rush Horsetail ITIS Taxonomic Serial No.
525635
Family Equisetaceae (Horsetail) SEINet
Reference
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Description Life zones and habitat: Plains to montane; moist, open areas, streamsides.
Plant: Annual 8 inches to more than 6 feet tall; unbranched stems with discernible ridges and distinct nodes.
Leaves: Grayish sheath at each node comprised of "leaves" with pointed tips; black band around the top and another black band just below.
Inflorescence: Single, brown, cone-shaped spore-producing structure (strobilus) atop each stem; conical shape with pointed tip.
References: Descr. adapted from Wildflowers of the Southern Rocky Mountains, and SEINet.
Colorado Status
Native
Scientific Name Equisetum laevigatum USDA PLANTS Symbol
EQLA
Common Name Smooth Scouring-rush, Smooth Horsetail ITIS Taxonomic Serial No.
17156
Family Equisetaceae (Horsetail) SEINet
Reference
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Description Life zones and habitat: Plains to montane; moist, open areas, streamsides.
Plant: Annual 8 inches to 5 feet tall; smooth stems with distinct nodes; usually unbranched.
Leaves: Green sheath at each node with a single black band around the top, tipped with a row of tiny black pointed teeth.
Inflorescence: Single, brown, cone-shaped spore-producing structure (strobilus) atop each stem; conical shape with rounded tip.
References: Descr. adapted from www.swcoloradowildflowers.com, Wildflowers of the Southern Rocky Mountains, and SEINet.
Colorado Status
Native
© Tom Lebsack 2018