quackgrass

Cyperales > Poaceae > Elymus repens (L.) Gould

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

  • Weeds of the Week - USDA Forest Service, Northeastern Area, Forest Health Protection

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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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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