jointed goatgrass

Cyperales > Poaceae > Aegilops cylindrica Host
Synonym(s): jointgrass

Jointed goatgrass is a winter annual that can reach 4 ft. (1.2 m) in height. The leaves are alternate, up to 1/2 in. (1.2 cm) wide with thin hairs along the margins, sheath openings and auricles. The ligule is short and membranous. Flowering occurs in May to June, when the plants produce red (when mature) or straw-colored spikes. Spikes are cylindrical and contain 2-12 spikelets per spike. The uppermost spikelets have extremely long awns. Jointed goatgrass is native to southern Europe and western Asia. This species is known to hybridize with wheat.


Identification, Biology, Control and Management Resources


Selected Images from Invasive.org

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Plant(s);
Richard Old, XID Services, Inc., Bugwood.org
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Seedling(s);
Steve Dewey, Utah State University, Bugwood.org
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Feature(s); auricles
Steve Dewey, Utah State University, Bugwood.org
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Foliage;
Steve Dewey, Utah State University, Bugwood.org
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Feature(s); compared to wheat
USDA APHIS PPQ Archive, USDA APHIS PPQ, Bugwood.org
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Flower(s);
Steve Dewey, Utah State University, Bugwood.org
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Seed(s); Native to Asia, has seeds that are similar in size and shape to wheat. This make contaminated shipments of wheat very difficult to clean.
Phil Westra, Colorado State University, Bugwood.org
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Plant(s);
Richard Old, XID Services, Inc., Bugwood.org
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Plant(s);
USDA APHIS PPQ Archive, USDA APHIS PPQ, Bugwood.org
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Infestation; A native to Asia, is a serious problem in wheat producing areas of the United States. It hybridizes with wheat and outcompetes the crop for nutrients and water.
Phil Westra, Colorado State University, Bugwood.org
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Seed(s);
Steve Hurst, 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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Invasive Reference(s):

Check Invasive.org for most current lists.
  • Arizona - Noxious Weed Law
  • California - Noxious Weed Law
  • Colorado - Noxious Weed Law
  • New Mexico - Noxious Weed Law
  • Oregon - Noxious Weed Law
  • Washington - Noxious Weed Law
  • Invasive Plants: Western North America


External Links


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