MANUAL OF THE GRASSES OF THE UNITED STATES 891 



Muhlenbergia mexicana var. commutata Farwell, Rep. Mich. Acad. Sci. 17: 181. 



1916. Based on M. mexicana commutata Scribn. 

 Muhlenbergia commutata Bush, Amer. Midi. Nat. 6: 61. 1919. Based on 



M. mexicana commutata Scribn. 

 Muhlenbergia mexicana forma commutata Farwell, Rhodora 26: 1. 1924. 



Based on M. mexicana commutata Scribn. 

 (2) Muhlenbergia microsperma (DC.) Kunth, R<v. Gram. 1: 64. 1829. Based 



on Trichochloa microsperma DC. 



Trichochloa microsperma DC., Cat. Hort. Monsp. 151. 1813. Mexico. 

 Podosaemum setosum H.B.K., Nov. Gen. and Sp. 1: 129. 1815. Mexico, 



Humboldt and Bonpland. 



Podosaemum debile H.B.K., Nov. Gen. and Sp. 1: 128. 1815. Ecuador, Hum- 

 boldt and Bonpland. 



Agrostis microsperma Lag., Gen. and Sp. Nov. 2. 1816. Mexico, Sess6. 

 Trichochloa debilis Roem. and Schult., Syst. Veg. 2: 385. 1817. Based on 



Podosaemum debile H.B.K. 

 Trichochloa setosa Roem. and Schult., Syst. Veg. 2: 386. 1817. Based on 



Podosaemum setosum H.B.K. 



Muhlenbergia fasciculata Trin., Gram. Unifl. 192. 1824. North America. 

 Agrostis setosa Spreng., Syst. Veg. 1: 262. 1825. Based on Podosaemum 



setosum H.B.K. 

 Agrostis debilis Spreng., Syst. Veg. 1: 262. 1825. Not A. debilis Poir., 1810. 



Based on Podosaemum debile H.B.K. 

 Muhlenbergia setosa Kunth, Rev. Gram. 1: 63. 1829. Based on Podosaemum 



setosum H.B.K. 

 Muhlenbergia debilis Kunth, ReV. Gram. 1: 63. 1829. Based on Podosaemum 



debile H.B.K. 

 Agrostis microcarpa Steud., Norn. Bot. ed. 2. 1: 41. 1840; 2: 164. 1841, as 



synonym of Muhlenbergia microsperma. 

 Muhlenbergia purpurea Nutt., Jour. Acad. Nat. Sci. Phila. II. 1: 186. 1848. 



Santa Barbara and Santa Catalina Island, Calif., Gambel. 

 Muhlenbergia ramosissima Vasey, Bull. Torrey Bot. Club 13: 231. 1886. 



Chihuahua, Mexico, Palmer [158] in 1885. 

 (34) Muhlenbergia montana (Nutt.) Hitchc., U.S. Dept.Agr. Bull. 772: 145, 147. 



1920. Based on Calycodon montanum Nutt. 

 Calycodon montanum Nutt., Jour. Acad. Nat. Sci. Phila. II. 1: 186. 1848. 



Santa Fe, [New] Mexico, Gambel. 

 Muhlenbergia gracilis var. breviaristata Vasey, in Torr., Cat. PL Survey W. 100th 



Merid. 54. 1874. Twin Lakes, Colo., [Wolf] 1090 in 1873. 

 Muhlenbergia gracilis var. major Vasey, in Wheeler, Rept. U.S. Survey 100th 



Merid. 6: 284. 1878. Mount Graham, Ariz., Wheeler Exped. [Roth- 

 rock] 744. 

 Muhlenbergia subalpina Vasey, Descr. Cat. Grasses U.S. 40. 1885. Based 



on M. gracilis var. breviaristata Vasey. 

 Muhlenbergia trifida Hack., Repert. Sp. Nov. Fedde 8: 518. 1910. Michoa- 



can, Mexico, Arsene 3217. 



This is the species referred to Muhlenbergia gracilis by American authors, not 

 M. gracilis (H.B.K.) Kunth. 



(38) Muhlenbergia monticola Buckl., Acad. Nat. Sci. Phila. Proc. 1862: 91. 

 1863. " North western Texas," [Wright 731]. 



Muhlenbergia sylvatica var. flexuosa Vasey in Wheeler, Rep. U.S. Survey 100th 

 Merid. 6: 284. 1878. New Mexico, Wright 731; Camp Crittenden, Ariz., 

 Rothrock 681. 



(39) Muhlenbergia parviglumis Vasey, Contrib. U.S. Natl. Herb. 3: 71. 1892. 

 Texas, Nealley. 



(40) Muhlenbergia pauciflora Buckl., Acad. Nat. Sci. Phila. Proc. 1862: 91. 

 1863. Western Texas, [Wright 732]. 



Muhlenbergia sylvatica var. pringlei Scribn., Bull. Torrey Bot. Club 9: 89. 



1882. Santa Rita Mountains, N.Mex., Pringle 480. 

 Muhlenbergia neo-mexicana Vasey, Bot. Gaz. 11: 337. 1886. New Mexico 



[type, G. R. Vasey] and Arizona. 

 Muhlenbergia pringlei Scribn., in Vasey, Contrib. U.S. Natl. Herb. 3: 71. 



1892. Santa Rita Mountains, N.Mex., Pringle 480. 

 (36) Muhlenbergia polycaulis Scribn., Bull. Torrey Bot. Club. 38: 327. 1911. 



Chihuahua, Mexico, Pringle 1414. 



(41) Muhlenbergia porteri Scribn.; Beal, Grasses N.Amer. 2: 259. 1896. Based 

 on M. texana Thurb. 



