quackgrass |
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| Cyperales > Poaceae > Elymus repens (L.) Gould
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Quackgrass is a perennial, cool-season, rhizomatous grass. The stems are green to whitish, erect to decumbent and can grow to 3 ft (0.9 m) tall. The leaves are 6-15.7 in. (15-40 cm) long and usually have a pair of prominent auricles at the base. Flowering occurs in May to September. The flower spikes are 3.9-11.8 in. (10-30 cm) long and have 3-8 florets per spikelet. Quackgrass is native to Europe and occurs in pastures, gardens, roadsides, and other disturbed open areas. |
Identification, Biology, Control and Management Resources
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Selected Images from Invasive.org
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Plant(s);
Steve Dewey, Utah State University, Bugwood.org
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Plant(s);
Steve Dewey, Utah State University, Bugwood.org
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Feature(s); Leaf collar region
Steve Dewey, Utah State University, Bugwood.org
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Feature(s); Roots
Steve Dewey, Utah State University, Bugwood.org
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Flower(s);
Richard Old, XID Services, Inc., Bugwood.org
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Fruit(s); infructescence
Dr. Lynn Clark and Anna Gardner, Iowa State University, Bugwood.org
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Fruit(s);
Dr. Lynn Clark and Anna Gardner, Iowa State University, Bugwood.org
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Feature(s); Florets in ventral view (left) and dorsal view (far right)
Julia Scher, USDA APHIS PPQ, Bugwood.org
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Plant(s);
Steve Dewey, Utah State University, Bugwood.org
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Plant(s);
Elizabeth Bella, USDA Forest Service, Bugwood.org
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Infestation;
Steve Dewey, Utah State University, Bugwood.org
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Diagram or Graphic; USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service.
USDA PLANTS Database, USDA NRCS PLANTS Database, Bugwood.org
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Diagram or Graphic; Hitchcock, A.S. (rev. A. Chase). 1950. Manual of the grasses of the United States. USDA Misc. Publ. No. 200. Washington, DC.
USDA PLANTS Database, USDA NRCS PLANTS Database, Bugwood.org
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Diagram or Graphic; Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 1: 283.
USDA PLANTS Database, USDA NRCS PLANTS Database, Bugwood.org
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Invasive Reference(s):
Check Invasive.org for most current lists.
- Alaska - Noxious Weed Law
- Arizona - Noxious Weed Law
- California - Noxious Weed Law
- Colorado - Noxious Weed Law
- Iowa - Noxious Weed Law
- Kansas - Noxious Weed Law
- Michigan - Noxious Weed Law
- Oregon - Noxious Weed Law
- Rhode Island - Invasive Species Council List
- Utah - Noxious Weed Law
- Virginia - Invasive Alien Plant Species
- Wyonming - Noxious Weed Law
- Mid-Atlantic - EPPC List
- Invasive Plants of the Upper Midwest
External Links
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