MANUAL OF THE GRASSES OF THE UNITED STATES 957 



Eatonia pubescens Scribn. and Merr., U.S.Dept.Agr., Div. Agrost. Circ. 27: 6. 

 1900. Starkville, Miss., Tracy. 



Eatonia robusta Rydb., Bull. Torrey Bot. Club 32: 602. 1905. Based on E. 

 obtusata var. robusta Vasey. 



Sphenopholis obtusata lobata Scribn., Rhodora 8: 144. 1906. Based on Tri- 

 setum lobatum Trin. 



Sphenopholis obtusata pubescens Scribn., Rhodora 8: 144. 1906. Based on 

 Eatonia pubescens Scribn. and Merr. 



Eatonia annua Suksdorf, West. Amer. Sci. 15: 50. 1906. Dalles on Columbia 

 River, Oreg., Suksdorf 1553. [Plants depauperate, flowering first year.] 



Sphenopholis obtusata var. pubescens Scribn.; Robinson, Rhodora 10: 65. 

 1908. Based on Eatonia pubescens Scribn. and Merr. 



Sphenopholis obtusata var. lobata Scribn.; Robinson, Rhodora 10: 65. 1908. 

 Based on Trisetum lobatum Trin. 



Sphenopholis annua Heller, Muhlenbergia 6: 12. 1910. Based on Eatonia 

 annua Suksdorf. 



Sphenopholis pubescens Heller, Muhlenbergia 6: 12. 1910. Based on Eatonia 

 pubescens Scribn. and Merr. 



Sphenopholis robusta Heller, Muhlenbergia 6: 12. 1910. Based on Eatonia 

 obtusata var. robusta Vasev. 



Reboulea obtusata var. lobata Farwell, Mich. Acad. Sci. Rept. 17: 182. 1916. 

 Based on Trisetum lobatum Trin. 



Reboulea obtusata var. pubescens Farwell, Mich. Acad. Sci. Rept. 17: 181. 1916. 

 Based on Eatonia pubescens Scribn. and Merr. 

 (6) Sphenopholis pallens (Spreng.) Scribn., Rhodora 8: 145. 1906. Based on 

 Aira pallens Spreng. 



A ira pallens Spreng., Mant. Fl. Hal. 33. 1807. Pennsylvania, Muhlenberg. 



Aira pallens Muhl., Descr. Gram. 84. 1817. No locality cited. Aira 

 pennsylvanica Spreng., erroneously given as synonym, Muhlenberg's descrip- 

 tion agreeing with that of A. pallens Spreng., not with that of A. pennsyl- 

 vanica Spreng. 



Eatonia aristata Scribn. and Merr., U.S.Dept.Agr., Div. Agrost. Circ. 27: 7. 

 1900. South Carolina, Curtiss in 1876. 



Eatonia pallens Scribn. and Merr., U.S.Dept.Agr., Div. Agrost. Circ. 27: 7. 

 1900. Based on Aira pallens Spreng. 



Trisetum aristatum Nash, in Small, Fl. Southeast. U.S. 130. 1903. Presum- 

 ably based on Eatonia aristata Scribn. and Merr. 



Sphenopholis aristata Heller, Muhlenbergia 6: 12. 1910. Based on Eatonia 

 aristata Scribn. and Merr. 



Reboulea pallens Farwell, Mich. Acad. Sci. Rept. 17: 181. 1916. Based on 

 Aira pallens Spreng. 



(76) SPOROBOLUS R. Br. 



(26) Sporobolus airoides (Torr.) Torr., U.S. Rept. Expl. Miss. Pacif. 7: 21. 



1856. Based on Agrostis airoides Torr. 

 Agrostis airoides Torr., Ann. Lye. N.Y. 1: 151. 1824. Branches of the 



Arkansas River near the Rockv Mountains, James. 

 Yilfa airoides Trin.; Steud., Norn. Bot. ed. 2. 2: 766. 1841. Based on 



Agrostis airoides Torr. 

 Sporobolus diffusissimus Buckl., Acad. Nat. Sci. Phila. Proc. 1862: 90. 1863. 



Western Texas [Wright 726]. 

 (18) Sporobolus argutus (Nees) Kunth, Rev. Gram. 1: Sup. XVII. 1830. Based 



on Vilfa arguta Nees. 

 Vilfa arguta Nees. Agrost. Bras. 395. 1829. Brazil. 

 Vilfa arkansana Trin., Mem. Acad. St. Petersb. VI. Sci. Nat. 4 1 : 64. 1S40. 



Arkansas, Beyrich. 

 Vilfa subpyramidata Trin., Mem. Acad. St. Petersb. VI. Sci. Nat. 4 1 : 61. 



1840. Texas [received from Hooker, the tvpe being Dnnnmond 377]. 

 Vilfa richardi Steud., Syn. PI. Glum. 1: 153." 1S54. West Indies. 

 Agrostis pyramidalis Rich.; Steud., Syn. PI. Glum. 1: 153. 1854, as synonym 



of Vilfa richardi Steud. 

 Vilfa agrostoidea Buckl., Acad. Nat. Sci. Phila. Proc. 1862: 88. 1863. Llano 



Count v, Tex. 

 Vilfa sabeana Buckl., Acad. Nat. Sci. Phila. Proc. 1862: 90. 1863. San Saba 



County, Tex., Buckley. Given as Vilfa (Sporobolus) sabeana. 

 Sporobolus arkansanus Nutt.; Vasey, Contrib. U.S. Natl. Herb. 3: 61. 1892, 



as synonym of S. argutus Kunth, 



