Paspalum dilatatum is a species of Poaceae known by the common name dallisgrass, Dallas grass, or sticky heads. It is native to Brazil and Argentina, but it is known throughout the world as an introduced species and at times a common weed. Its rapid growth and spreading make it an invasive species in some areas. It is present in the southern half of North America, southern Europe, much of Africa, Australia, New Zealand, and many tropical and subtropical areas.
Paspalum dilatatum is a food source for several avian species, including the long-tailed widowbird.
The common name dallisgrass was derived from A. T. Dallis, a 19th-century farmer who grew the species extensively near La Grange, Georgia.
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