smooth cordgrass

Cyperales > Poaceae > Spartina alterniflora Loisel.
Synonym(s): Atlantic cordgrass, saltmarsh cordgrass

Smooth cordgrass is a perennial grass that expands via underground rhizomes. It is native to the eastern United States, but is considered invasive, in salt marshes, in California. Hollow stems grow from 2-4 ft. (0.6-1.2 m) tall. Leaves are 8-20 in. (20-50 cm) long, 1-8 in. (2.5-20 cm) wide and are often purplish at the base. Flowering occurs in July to November, when densely packed clusters of tan flowers develop. Smooth cordgrass was introduced on the west coast in the early 1970s to be used as erosion control. Plants have become extremely invasive in San Francisco Bay, Willapa Bay and Puget Sound.


Identification, Biology, Control and Management Resources


Selected Images from Invasive.org

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Infestation;
John M. Randall, The Nature Conservancy, Bugwood.org
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Infestation;
John M. Randall, The Nature Conservancy, Bugwood.org
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Infestation;
John M. Randall, The Nature Conservancy, 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.
  • California - Invasive Plant Inventory
  • Oregon - Noxious Weed Law
  • Washington - Noxious Weed Law
  • Invasive Plants: Western North America
  • Invasive Plants: Guide to Identification and the Impacts and Control of Common North American Species


External Links


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USDA Forest Service Bugwood University of Georgia