quackgrass USDA PLANTS Symbol: ELRE4
U.S. Nativity: Exotic
Habit: Grass or Grasslike
Elymus repens (L.) Gould

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Taxonomic Rank: Liliopsida: Cyperales: Poaceae
Synonym(s): couch grass, dog grass, quickgrass, scutch, quitch, twitch
Native Range: Eurasia (BAIL); (NRCS)

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

Selected Images from Invasive.orgView All Images at Invasive.org


Plant(s);
Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org
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Plant(s);
Elizabeth Bella, USDA Forest Service, Bugwood.org
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Plant(s);
Steve Dewey, Utah State University, Bugwood.org
Additional Resolutions & Image Usage

Fruit(s);
Dr. Lynn Clark and Anna Gardner, Iowa 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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Feature(s);
Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org
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Feature(s); Leaf collar region
Steve Dewey, Utah State University, Bugwood.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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Root(s); Roots
Steve Dewey, Utah State University, Bugwood.org
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Infestation;
Steve Dewey, Utah State University, Bugwood.org
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Floret(s); Florets in ventral view (left) and dorsal view (far right)
Julia Scher, USDA APHIS PPQ, Bugwood.org
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Plant(s); 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
Additional Resolutions & Image Usage

Plant(s); 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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Plant(s); 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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EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.

U.S. National Parks where reported invasive:
Antietam National Battlefield (Maryland)
Badlands National Park (South Dakota)
Colonial National Historical Park (Virginia)
Grand Canyon National Park (Arizona)
Rocky Mountains National Park (Colorado)
Yellowstone National Park (Wyoming)



Invasive Listing Sources:
City of Ann Arbor Michigan Parks and Recreation
Faith Campbell, 1998
Hoffman, R. & K. Kearns, Eds. 1997. Wisconsin manual of control recommendations for ecologically invasive plants. Wisconsin Dept. Natural Resources, Bureau of Endangered Resources. Madison, Wisconsin. 102pp.
Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
John Randall, The Nature Conservancy, Survey of TNC Preserves, 1995.
Mid-Atlantic Exotic Pest Plant Council, 2005
Pacific Northwest Exotic Pest Plant Council, 1998
Virginia Department of Conservation and Recreation, 2009