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or co·gon grass  (kō′gôn-grăs′, -gōn- -gən-, )
A perennial grass (Imperata cylindrica) native chiefly to Southeast Asia and Africa that is used for thatching and is widespread as a weed in warm regions.

[Spanish cogón, from Tagalog kugon.]
References in periodicals archive ?
Cogongrass (Imperatacylindrical) Invasive species management plans for Florida.
JUST LIKE KUDZU AND FIRE ANTS, Cogongrass has become a major problem for southwestern Alabama landowners.
Effect of nicosulfuron dosages and timing on the postemergence control of cogongrass (Imperatacylindrica) in corn.
The species appearing on both lists are Cogongrass (Imperata cylindrica), Giant Hogweed (Heracleum mantegazzianum), Old World Climbing Fern (Lygodium microphyllum), Tropical Soda Apple (Solanum viarum), and Witchweed (Striga asiatica).
Currently, cogongrass is the target of the largest effort in history to shut out an invasive plant: $10.
Cogongrass, considered the seventh most noxious plant pest in the world, is found in at least 44 Mississippi counties.
Factors limiting the distribution of cogongrass, Imperata cylindrica, and torpedograss, Panicum repens.
About 130 acres has just been planted with longleaf seedlings on a tract being converted back to its native ecosystem, and an invasive exotic, Cogongrass, was subdued after several applications of herbicide.
Before planting, though, the Division of Forestry must eradicate an invasive exotic, cogongrass (Imperata cylindrica), which has taken over about 5,000 acres of state land.