MANUAL OF THE GRASSES OF THE UNITED STATES 889 



Sporobolus simplex Scribn., U.S. Dept. Agr., Div. Agrost. Bull. 11: 48. 1898. 



Georgetown, Colo., Rydberg 2411. 

 Sporobolus aristatus Rydb., Bull. Torrey Bot. Club 28: 266. 1901. Big 



Horn Mountains, Wyo., Tweedy 2196. , 



Sporobolus simplex thermale Merr., Rhodora 4: 48. 1902. Lolo Hot Springs, 



Mont., Griffiths 302a. xt 



Muhlenbergid simplex Rydb., Bull. Torrey Bot. Club 32: 600. 1905. Not 



M simplex Kunth, 1829. Based on Sporobolus simplex Scribn. 

 Muhlenbergia aristulata Rydb., Bull. Torrey Bot. Club 32: 600. 1905. Based 



on Sporobolus aristatus Rydb. 

 (29) Muhlenbergia foliosa (Roem. and Schult.) Trin., Gram. Unifl. 190. 1824. 



Based on Agrostis foliosa "Hortul." Roem. and Schult. 

 Agrostis filiformis Willd., Enum. PL 1: 95. 1809. Not A. filiformis Vill. 1787. 



[Pennsylvania], North America. 

 Agrostis foliosa "Hortul."; Roem. and Schult., Syst. Veg. 2: 373. 1817. 



Garden specimen; seed from North America. 

 Trichochloa foliosa Trin., Fund. Agrost. 117. 1820. Based on Agrostis 



filiformis Willd. 

 Cinna filiformis Link, Enum. PL 1: 70. 1821. Based on Agrostis filiformis 



Willd. 

 Agrostis lateriflora var. filiformis Torr. Fl. North, and Mid. U.S. 1: 86. 1823. 



Based on A. filiformis Muhl. (error for Willd.). 

 Trichochloa filiformis Trin.; Torr., Fl. North, and Mid. U.S. 86. 1823, as 



synonym of Agrostis lateriflora var. filiformis Torr. 

 Podosaemum foliosum Link, Hort. Berol. 1: 83. 1827. Based on Agrostis 



foliosa Roem. and Schult. 

 Muhlenbergia mexicana var. purpurea Wood, Amer. Bot. and Flor. pt. 2: 386. 



1870. Illinois, Wolf. 

 Muhlenbergia sylvatica var. vulpina Wood, Amer. Bot. and Flor. pt. 2: 386. 



1 870 . New York , Lord. 

 Calamagrostis compressa Doell, in Mart., Fl. Bras. 2 3 : 56. 1878. "E semi- 



nibus a cl. Glaziou prope Rio de Janeiro lectis in horto bot. Monacensi 



anno 1869 cultura enata." A specimen named in Doell's script and bearing 



the above data is in Doell's herbarium in the Botanical Institute at Freiburg. 



This agrees perfectly with Doell's description. It is a characteristic speci- 

 men of Muhlenbergia foliosa except that the rachilla is minutely produced 



beyond the palea, a very rare occurrence in Muhlenbergia. Presumably the 



seed from Rio de Janeiro failed to germinate, and this species, probably in 



a neighboring plot, intruded. 

 Muhlenbergia mexicana var. filiformis Vasey, Grasses U.S. 23. 1883. Name 



only. 

 Muhlenbergia mexicana filiformis Scribn., Mem. Torrey Bot. Club 5: 36. 1894. 



Based on A. filiformis Muhl. (error for Willd.). 

 Muhlenbergia polystachya Mackenz. and Bush, Man. Fl. Jackson County 23. 



1902. Sibley, Mo., Mackenzie 637. 

 Muhlenbergia ambigua var. filiformis Farwell, Mich. Acad. Sci. Rept. 20: 168. 



1919. Based on Agrostis filiformis Muhl. (error for Willd.). 

 Muhlenbergia foliosa var. setiglumis (S. Wats.) Scribn., Rhodora 9: 20. 



1907. Based on M. sylvatica var. setiglumis S. Wats. (Published as 



M. foliosa setiglumis.) 

 Muhlenbergia ambigua Torr., in NicolL, Rept. Miss. 164. 1843. "Okaman 



Lake, Sioux Country," Geyer. 

 Muhlenbergia sylvatica var. setiglumis S. Wats., in King, Geol. Expl. 40th Par. 5: 



378. 1871. Humboldt Pass, Nev., Watson 1288. 

 Muhlenbergia foliosa ambigua Scribn., Rhodora 9: 20. 1907. Based on M. 



ambigua Torr. 

 Muhlenbergia setiglumis Nels. and Macbr., Bot. Gaz. 61: 30. 1916. Based on 



M. sylvatica var. setiglumis S. Wats. 

 Muhlenbergia foliosa forma ambigua Wiegand, Rhodora 26: 1. 1924. Based 



on M. ambigua Torr. 

 (27) Muhlenoergia glabrifiora Scribn., Rhodora 9: 22. 1907. Texas, Rever- 



chon 5. 

 (20) Muhlenbergia glauca (Nees) Mez, Repert. Sp. Nov. Fedde 17: 214. 1921. 



Based on Podosaemum glaucum Nees. In Index Kewensis this name is cred- 

 ited to Nees in Linnaea 19: 689. 1847, but the name there is Podosaemum 



glaucum. 

 Podosaemum glaucum Nees, Linnaea 19: 689. 1847. Mexico, Aschenborn 335. 



