Revised October 2010

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Identifying Grass Seedlings

Texas panicum (Panicum texanum or Urochloa texanum)

Summer annual grasses

Description

Texas panicum is a spreading summer annual with relatively wide leaves that may have an erect growth habit, or it may grow close to the ground with tips ascending (decumbent growth habit). Leaf blades range from 3–11 inches in length and may reach a width of 20 mm. Leaves are covered with short, soft hairs on both surfaces. Auricles are absent and the ligule is membranous and fringed with hairs, from 1–1.8 mm long.

Mature Texas panicumMature Texas panicum.
 

Collar region SeedlingCollar region: membranous ligule fringed with hairs.
Right, seedling.
 

Habitat

Occurs primarily as a weed of agronomic crops.

Distribution

Found throughout the southeastern United States but occurs only sporadically in the southern third of Missouri.

Similar species

Very similar in appearance and growth habit to large crabgrass and broadleaf signalgrass.  However, large crabgrass has a tall membranous ligule unlike either of these other species. Broadleaf signalgrass has hairs only along the leaf margins, unlike Texas panicum.

IPM1024, revised October 2010

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IPM1024 Identifying Grass Seedlings | Page 15 | University of Missouri Extension