Cheatgrass is one of the most widespread introduced annual grasses in the North America, occurring in all 50 states as well as in most of the Canadian provinces and also in parts of Mexico. It is most common where annual rainfall ranges from 15-55 cm (6- 22 in) and autumn rainfall ranges from 5-12 cm (2- 6 in) (Peepers 1984). It is a weed of roadsides, cropland, hayland, pastureland, rangeland and waste places, usually occurring on dry, sometimes weakly alkaline, clayey to loamy to sandy or gravelly soils. Cheatgrass is especially common in the western states including the Columbia Basin, Snake River Basin and the Great Basin (Morrow & Stahlman 1984). Uncommon or sporadic in the southeastern part of the United States, it is abundant over large areas of sagebrush plant communities, where whole landscapes are lush green, turning red- purplish by the developing inflorescences, then a tan- straw- buff color as the plants mature and cure.
For current distribution, consult the Plant Profile page for this species on the PLANTS Web site.
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