Species in the genus include:[11][12][13]
- 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 alopecuroides (Griseb.) P.M.Peterson & Columbus – southwestern US, northern Mexico, northern Argentina
- 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[14]
- 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
- Muhlenbergia curviaristata (Ohwi) Ohwi - Japan, Manchuria, Kuril Islands
- Muhlenbergia cuspidata (Torr. ex Hook.) Rydb. – Plains muhly - from Alberta to Virginia
- Muhlenbergia decumbens Swallen - central Mexico
- Muhlenbergia depauperata Scribn. - United States (Arizona New Mexico Colorado Utah Texas), northeastern Mexico
- Muhlenbergia distichophylla (J.Presl) Kunth - Mexico, Guatemala
- Muhlenbergia diversiglumis Trin. - from northern Mexico to Peru
- Muhlenbergia dubia E.Fourn. - Arizona New Mexico Texas, Mexico
- Muhlenbergia dumosa – Bamboo muhly - Mexico, Arizona
- Muhlenbergia durangensis Y.Herrera - Durango
- Muhlenbergia duthieana Hack. - Pakistan, Nepal, Kashmir, Himanchal Pradesh, Uttaranchal
- Muhlenbergia elongata Scribn. ex Beal - Arizona (Pima + Santa Cruz Counties), northern Mexico
- Muhlenbergia eludens C.Reeder - United States (Arizona New Mexico Texas), northern Mexico
- Muhlenbergia emersleyi Vasey – Bullgrass - United States (Arizona Nevada New Mexico Texas North Carolina), Mexico, Guatemala, Honduras
- Muhlenbergia eriophylla Swallen - Mexico
- Muhlenbergia expansa – Cutover muhly - United States (Texas Oklahoma Louisiana Mississippi Alabama Georgia Florida South Carolina North Carolina Virginia Massachusetts)
- Muhlenbergia fastigiata (J.Presl) Henrard - Bolivia, Peru, Colombia, Chile, Argentina
- Muhlenbergia filiculmis Vasey - United States (Arizona New Mexico Utah Colorado Wyoming North Dakota)
- Muhlenbergia filiformis (Thurb. ex S.Watson) Rydb. – Pullup muhly - western United States, British Columbia, Sonora, Baja California
- Muhlenbergia flabellata Mez - Costa Rica, Panamá
- Muhlenbergia flavida Vasey - Mexico
- Muhlenbergia flaviseta Scribn. - Mexico
- Muhlenbergia flexuosa Hitchc. - Peru
- Muhlenbergia fragilis Swallen - Mexico, United States (California Nevada Utah Arizona New Mexico Texas)
- Muhlenbergia frondosa (Poir.) Fernald - eastern + central United States + Canada
- Muhlenbergia gigantea (E.Fourn.) Hitchc. - Mexico
- Muhlenbergia glabriflora Scribn. - south-central United States
- Muhlenbergia glauca (Nees) Mez - Mexico, United States (California Arizona New Mexico Texas)
- Muhlenbergia glomerata (Willd.) Trin. – Marsh muhly, spiked muhly - northern United States, Canada including Yukon + NWT
- Muhlenbergia grandis Vasey - Mexico
- Muhlenbergia gypsophila C.Reeder & Reeder - Mexico
- Muhlenbergia hakonensis (Hack.) Makino - China (Sichuan, Anhui), Korea, Japan
- Muhlenbergia himalayensis Hack. ex Hook.f. - Afghanistan, northern Pakistan, Tajikistan, northern + eastern India, Tibet, Nepal, Bhutan, Sichuan, Yunnan
- Muhlenbergia hintonii Swallen - Mexico
- Muhlenbergia huegelii Trin. - widespread from Afghanistan to Primorye to New Guinea, including India + China
- Muhlenbergia implicata (Kunth) Trin. - Mesoamerica, Colombia, Venezuela
- Muhlenbergia inaequalis Soderstr. - Colombia, Venezuela
- Muhlenbergia involuta Swallen - Texas
- Muhlenbergia iridifolia Soderstr. - Mexico
- Muhlenbergia jaime-hintonii P.M.Peterson & Valdés-Reyna - Mexico
- Muhlenbergia jaliscana Swallen - Mexico
- Muhlenbergia japonica Steud. - China, Japan, Korea, Primorye, Khabarovsk
- Muhlenbergia jonesii (Vasey) Hitchc. - northeastern California
- Muhlenbergia laxa Hitchc. - Veracruz
- Muhlenbergia lehmanniana Henrard - Costa Rica, Panama, Colombia, Venezuela. Ecuador
- Muhlenbergia ligularis (Hack.) Hitchc. - from Costa Rica to Argentina
- Muhlenbergia ligulata (E.Fourn.) Scribn. & Merr. - Mexico
- Muhlenbergia lindheimeri Hitchc. – Lindheimer muhly, big muhly - Texas, Coahuila
- Muhlenbergia longiglumis Vasey - Mexico
- Muhlenbergia longiligula Hitchc. - Mexico, United States (Arizona New Mexico Texas Nevada)
- Muhlenbergia lucida Swallen - Mexico
- Muhlenbergia macroura (Humb., Bonpl. & Kunth) Hitchc. - Mexico, Guatemala
- Muhlenbergia majalcensis P.M.Peterson - Mexico
- Muhlenbergia maxima Laegaard & Sánchez Vega - Peru
- Muhlenbergia mexicana (L.) Trin. – Mexican muhly - United States, Canada incl. Yukon
- Muhlenbergia michisensis Y.Herrera & P.M.Peterson - Mexico
- Muhlenbergia microsperma (District of Columbia.) Kunth – Littleseed muhly - United States (California Arizona Nevada Utah), Mexico, Guatemala, Colombia, Venezuela, Ecuador, Peru, Galápagos, Bolivia
- Muhlenbergia minutissima (Steud.) Swallen – Annual muhly - United States (Washington Oregon California Idaho Montana Wyoming Nebraska South Dakota Utah Nevada Arizona New Mexico Texas), Mexico, Guatemala
- Muhlenbergia monandra Alegría & Rúgolo - Peru
- Muhlenbergia montana (Nutt.) Hitchc. – Mountain muhly - United States (Montana Wyoming Colorado Utah Nevada Arizona California New Mexico Texas), Mexico
- Muhlenbergia mucronata (Kunth) Trin. - Mexico
- Muhlenbergia multiflora Columbus - western United States
- Muhlenbergia mutica (E.Fourn.) Hitchc. - Mexico
- Muhlenbergia nigra Hitchc. - Mexico, Costa Rica, Guatemala
- Muhlenbergia orophila Swallen - Mexico, Guatemala
- Muhlenbergia palmeri Vasey - Mexico, southern Arizona
- Muhlenbergia palmirensis Grignon & Lægaard - Ecuador
- Muhlenbergia paniculata (Nutt.) P.M.Peterson - central Canada, central + western United States, northeastern Mexico, northern Argentina
- Muhlenbergia pauciflora Buckley - United States (Colorado Utah Texas New Mexico Arizona California), Mexico
- Muhlenbergia pectinata Goodd. - Mexico, southern Arizona
- Muhlenbergia peruviana – Peruvian muhly - United States (Arizona New Mexico), Mesoamerica, western South America, Galápagos
- Muhlenbergia pilosa P.M.Peterson, Wipff & S.D.Jones - México State, Guerrero
- Muhlenbergia plumbea (Trin.) Hitchc. - Mexico, Guatemala
- Muhlenbergia polycaulis Scribn. - United States (Utah Texas New Mexico Arizona), Mexico
- Muhlenbergia porteri Scribn. ex Beal – Bush muhly - United States (Colorado Oklahoma Utah Nevada Texas New Mexico Arizona California), Mexico
- Muhlenbergia pubescens (Humb., Bonpl. & Kunth) Hitchc. - Mexico
- Muhlenbergia pubigluma Swallen - Mexico
- Muhlenbergia pungens Thurb. – Sandhill muhly - United States (Nebraska South Dakota Colorado Wyoming Arizona Utah New Mexico Texas)
- Muhlenbergia purpusii Mez - Mexico
- Muhlenbergia quadridentata (Kunth) Trin. - Mexico, Guatemala
- Muhlenbergia racemosa (Michx.) Britton, Sterns & Poggenb. – Green muhly, marsh muhly
- Muhlenbergia ramosa (Hack.) Makino - Canada, United States, northern Mexico
- Muhlenbergia ramulosa (Humb., Bonpl. & Kunth) Swallen - United States (Arizona New Mexico Colorado), Mesoamerica, Argentina
- Muhlenbergia reederorum Soderstr. - Mexico
- Muhlenbergia repens (J.Presl) Hitchc. - Mexico, United States (Arizona New Mexico Texas Colorado Oklahoma Utah)
- Muhlenbergia reverchonii – Seep muhly - United States (Texas Oklahoma)
- Muhlenbergia richardsonis – Mat muhly - Canada (incl Yukon + NWT), United States (Alaska plus northern + western states), northern + central Mexico
- Muhlenbergia rigens – Deergrass - Mexico, United States (California Nevada Arizona New Mexico Texas)
- Muhlenbergia rigida (Kunth) Kunth - United States (Arizona New Mexico Texas), Mexico, South America (Colombia to Argentina)
- Muhlenbergia robusta (E.Fourn.) Hitchc. - Mexico, Central America
- Muhlenbergia schmitzii Hack. - Mexico
- Muhlenbergia schreberi – Nimblewill - eastern + central United States, Ontario, Mexico, Uruguay, southern Brazil, northern Argentina
- Muhlenbergia scoparia Vasey - Mexico
- Muhlenbergia seatonii Scribn. ex Seaton - Mexico
- Muhlenbergia sericea (Michx.) P.M.Peterson United States (Texas Alabama Florida Georgia Louisiana Mississippi North Carolina South Carolina)
- Muhlenbergia setarioides E.Fourn. - Mexico, Central America
- Muhlenbergia setifolia Vasey - United States (Arizona New Mexico Texas), Mexico
- Muhlenbergia sinuosa Swallen - United States (Arizona New Mexico), Mexico
- Muhlenbergia sobolifera (Muhl.) Trin. - eastern + central United States, Ontario
- Muhlenbergia spatha Columbus - Mexico
- Muhlenbergia speciosa Vasey - Mexico
- Muhlenbergia spiciformis Trin. - Mexico, Cuba, United States (New Mexico Texas)
- Muhlenbergia straminea Hitchc. - Mexico, United States (New Mexico Arizona Texas)
- Muhlenbergia stricta (J.Presl) Kunth - Mexico
- Muhlenbergia strictior Beal - Mexico
- Muhlenbergia subaristata Swallen - Mexico
- Muhlenbergia subbiflora Hitchc. - Mexico
- Muhlenbergia sylvatica (Torr.) Torr. ex A. Gray – Woodland muhly - eastern + central United States, Quebec, Ontario[15]
- Muhlenbergia tarahumara P.M.Peterson & Columbus - Mexico
- Muhlenbergia tenella (Kunth) Trin. - Mexico, Central America, Colombia, Argentina
- Muhlenbergia tenuiflora (Willd.) Britton, Stern & Poggenb. - eastern + central United States, Quebec, Ontario
- Muhlenbergia tenuifolia (Kunth) Kunth - United States (Texas New Mexico Arizona Colorado), Mexico, Peru, Argentina
- Muhlenbergia tenuissima (J.Presl) Kunth - Mexico, Central America
- Muhlenbergia texana Buckley - Mexico, United States (Arizona New Mexico Texas)
- Muhlenbergia thurberi (Scribn.) Rydb. - Mexico, United States (Texas New Mexico Arizona Colorado Utah Nevada)
- Muhlenbergia torreyana (Schult.) Hitchc. – New Jersey muhly, Torrey's muhly, Torrey's dropseed - New Jersey New York Delaware Maryland North Carolina Tennessee Georgia
- Muhlenbergia torreyi (Kunth) Hitchc. ex Bush - southwestern United States, Mexico, Argentina
- Muhlenbergia trifida Hack. - Mexico, Guatemala
- Muhlenbergia uniflora (Muhl.) Fernald - Canada, northeastern United States
- Muhlenbergia utilis (Torr.) Hitchc. – Aparejograss - Mexico, United States (California Nevada Arizona New Mexico Texas)
- Muhlenbergia vaginata Swallen - Mexico, Guatemala
- Muhlenbergia venezuelae Luces - Mérida State in Venezuela
- Muhlenbergia versicolor Swallen - Mexico, Guatemala, Honduras
- Muhlenbergia villiflora Hitchc. - Mexico, United States (New Mexico Texas)
- Muhlenbergia virescens (Kunth) Kunth - Mexico
- Muhlenbergia virletii (E.Fourn.) Soderstr. - Mexico
- Muhlenbergia watsoniana Hitchc. - Mexico
- Muhlenbergia wrightii Vasey ex J.M.Coult. - Mexico, United States (Nevada Utah Colorado Arizona New Mexico Texas Texas Kansas)
- Muhlenbergia xanthodas Soderstr. - Chiapas
Numerous species are now considered better suited to other genera, such as Aegopogon, Agrostis, Apera, Arundinella, Brachyelytrum, Calamagrostis, Cinna, Dichelachne, Garnotia, Limnodea, Lycurus, Melinis, Ortachne, Sporobolus, Triniochloa.[11]
