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Weed Identification in Christmas Trees

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Barnyardgrass - Echinochloa crus-galli (L.) Beauv.
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Barnyardgrass collar region. Barnyardgrass seedhead.
Barnyardgrass collar region. Barnyardgrass seedhead.
Life cycle: Erect summer annual.

Leaves: Hairless leaves, occasionally with a few hairs near the base, are rolled in the bud and up to 20 inches long. Leaves have a distinct midvein and are rough to the touch on both surfaces.

Ligule: Absent.

Stems: Erect, thick, hairless, up to 5-foot-tall stems are round to flattened in cross-section and are often bent, branched and purple-tinted at the base.

Flowers and fruit: The seedhead consists of several coarse, thick branches that occur in an upright to nodding terminal panicle. The green, purple to brown panicle yields tan to brown, shiny, oval seeds.

Reproduction: Seeds.
 
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02/08/08