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

  • Weed of the Week - USDA Forest Service
    http://www.na.fs.fed.us/fhp/invasive_plants/weeds/quackgrass.pdf - Nov 7, 2006

Selected Images

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Number:1459493
Description: Plant(s);
Photographer:Steve Dewey, Utah State University
 Additional Resolutions and Image Usage
 
Number:1459494
Description: Plant(s);
Photographer:Steve Dewey, Utah State University
 Additional Resolutions and Image Usage
 
Number:1459495
Description: Feature(s); Leaf collar region
Photographer:Steve Dewey, Utah State University
 Additional Resolutions and Image Usage
 
Number:1459498
Description: Feature(s); Roots
Photographer:Steve Dewey, Utah State University
 Additional Resolutions and Image Usage
 
Number:5243035
Description: Flower(s);
Photographer:Richard Old, XID Services, Inc.
 Additional Resolutions and Image Usage
 
Number:1357005
Description: Fruit(s);

infructescence

Photographer:Dr. Lynn Clark and Anna Gardner, Iowa State University
 Additional Resolutions and Image Usage
 
Number:1357001
Description: Fruit(s);
Photographer:Dr. Lynn Clark and Anna Gardner, Iowa State University
 Additional Resolutions and Image Usage
 
Number:1195006
Description: Feature(s);

Florets in ventral view (left) and dorsal view (far right)

Photographer:Julia Scher, USDA APHIS PPQ
 Additional Resolutions and Image Usage
 
Number:1459496
Description: Plant(s);
Photographer:Steve Dewey, Utah State University
 Additional Resolutions and Image Usage
 
Number:1196132
Description: Plant(s);
Photographer:Elizabeth Bella, USDA Forest Service
 Additional Resolutions and Image Usage
 
Number:1459497
Description: Infestation;
Photographer:Steve Dewey, Utah State University
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Number:5307040
Description: Diagram or Graphic; USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service.
Photographer:USDA PLANTS Database, USDA NRCS PLANTS Database
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Number:5306053
Description: 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.
Photographer:USDA PLANTS Database, USDA NRCS PLANTS Database
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Number:5306052
Description: Diagram or Graphic; Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 1: 283.
Photographer:USDA PLANTS Database, USDA NRCS PLANTS Database
 Additional Resolutions and Image Usage
 

External Links

Invasive Reference(s)

Subject Reference(s)

  • USDA, NRCS. 2001. The PLANTS Database, Version 3.1, National Plant Data Center, Baton Rouge, LA 70874-4490 USA. - http://plants.usda.gov/