Muhlenbergia is a genus of plants in the grass family. The genus is named in honor of the German-American amateur botanist Gotthilf Heinrich Ernst Muhlenberg (1753-1815). Many of the species are known by the common name muhly. The greatest number are native to the southwestern United States and Mexico, but there are also native species in Canada, Central and South America and in Asia. Species Species in the genus include: Muhlenbergia aguascalientensis Y.Herrera & De la Cerda - Aguascalientes Muhlenbergia alamosae Vasey - Aguascalientes, Chihuahua, Sonora, Sinaloa, Durango, Baja California, Baja California Sur, Guanajuato, Jalisco, Mexico State, Morelos, Zacatecas Muhlenbergia andina (Nutt.) Hitchc. – Foxtail muhly - western Canada, western United States Muhlenbergia angustata (J.Presl) Kunth - South America Muhlenbergia annua (Vasey) Swallen - Chihuahua, Sonora, Chiapas, Durango Muhlenbergia appressa C.O.Goodd. – Devil's Canyon muhly - United States (California Arizona), Baja California, Baja California Sur Muhlenbergia arenacea (Buckley) Hitchc. - United States (Colorado New Mexico Texas Arizona), Chihuahua, Sonora, Coahuila, San Luis Potosí, Zacatecas Muhlenbergia arenicola Buckley - United States (Arizona New Mexico Texas Oklahoma Kansas Colorado), Mexico, Argentina Muhlenbergia argentea Vasey - Mexico Muhlenbergia arizonica Scribn. United States (New Mexico Arizona), Mexico Muhlenbergia arsenei Hitchc. - United States (California Nevada Utah Arizona New Mexico), Mexico Muhlenbergia articulata Scribn. - Mexico Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi – Scratchgrass - from Canada to Chile Muhlenbergia atacamensis Parodi - Argentina, Bolivia Muhlenbergia aurea Swallen - Guatemala Muhlenbergia biloba Hitchc. - Mexico Muhlenbergia brandegeei C.Reeder - Baja California Muhlenbergia breviaristata (Hack.) Parodi - Argentina Muhlenbergia breviculmis Swallen - Guatemala Muhlenbergia brevifolia Scribn. ex Beal - Mexico Muhlenbergia breviligula Hitchc. - southern Mexico, Guatemala, Honduras, Nicaragua Muhlenbergia brevis Goodd. - United States (Arizona New Mexico Texas Colorado), Mexico Muhlenbergia breviseta E.Fourn. - Mexico Muhlenbergia brevivaginata Swallen - Mexico Muhlenbergia bushii R.W.Pohl - central + eastern United States Muhlenbergia californica Vasey – California muhly - California (San Bernardino, Riverside, + Los Angeles Counties) Muhlenbergia capillaris – Hairawn muhly - United States (from Texas to Massachusetts; Mexico, Guatemala, Bahamas, Cuba, Puerto Rico Muhlenbergia capillipes (M.E.Jones) P.M.Peterson & Annable - northeastern Mexico Muhlenbergia caxamarcensis Laegaard & Sánchez Vega - Peru Muhlenbergia ciliata (Kunth) Kunth - from central Mexico to northwestern Argentina Muhlenbergia crispiseta Hitchc. - western Texas, northern Mexico Muhlenbergia cualensis Y.Herrera & P.M.Peterson - southern Mexico Muhlenbergia curtifolia Scribn. - Arizona Nevada Utah Wyoming Muhlenbergia curtisetosa (Scribn.) Bush - from Ontario to Texas