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Weed Identification in Christmas Trees

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Quackgrass - Elymus repens (L.) Gould
Home > quackgrass
Quackgrass collar region. Quackgrass seedhead.
Quackgrass collar region. Quackgrass seedhead.
Quackgrass patch.
Patch of quackgrass.
Life cycle: Erect, rhizomatous perennial.

Leaves: Leaves are rolled in the bud, hairless to sparsely hairy above and up to 8 inches long. Leaf sheaths are hairless except those near the base, which may be sparsely hairy. Clasping, clawlike auricles are present at the collar region.

Ligule: Very short, membranous ligule.

Stems: Erect and clump-forming, up to 4 feet tall. Plants spread by thin, yellowish to white, sharp-tipped rhizomes.

Flowers and fruit: The seedhead is a 2- to 10-inch-long, slender, unbranched spike made up of several alternating spikelets arranged edgewise on the stem. Each spikelet contains up to eight straw-colored, lance-shaped seeds. Each seed has a short to prominent awn.

Reproduction: Seeds and rhizomes.

Sharp-tipped rhizome of quackgrass.
Sharp-tipped rhizome of quackgrass.
 
The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the Michigan Agricultural Experiment Station, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.
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02/08/08