974 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Sphenopholis interrupta Scribn., Rhodora 8: 145. 1906. Based on Trisetum 



interruptum Buckl. 

 Sphenopholis hallii Scribn., Rhodora 8: 146. 1906. Based on Trisetum hallii 



Trisetum interruptum hallii Hitchc., Biol. Soc. Wash. Proc. 41: 160. 1928. 



Based on T. hallii Buckl. 

 (1) Trisetum melicoides (Michx.) Scribn., Bot. Gaz. 9: 169. 1884. Based on 



Aira melicoides Michx. 



Aira melicoides Michx., Fl. Bor. Amer. 1: 62. 1803. Canada. 

 t Arundo airoides Poir., in Lam., Encycl. 6: 270. 1804. North America, 



Michaux. 

 Graphephorum melicoideum Desv., Nouv. Bull. Soc. Philom. Paris 2: 189. 



1810. Based on Aira melicoides Michx. 

 IDeyeuxia airoides Beauv., Ess. Agrost. 44, 152, 160. 1812. Based on Arundo 



airoides Michx. [error for Poir.]. 



Poa melicoides Nutt., Gen. PI. 1: 68. 1818. Based on Aira melicoides Michx. 

 Triodia melicoides Spreng., Syst. Veg. 1: 331. 1825. Based on Aira melicoides 



Michx. 

 tAgrostis airoides Raspail, Ann. Sci. Nat., Bot. 5: 449. 1825. Based on 



Deyeuxia airoides Beauv. 

 tCalamagrostis airoides Steud., Nom. Bot. ed. 2. 1: 249. 1840. Based on 



Arundo airoides Poir. 

 Dupontia cooleyi A. Gray, Man. ed. 2. 556. 1856. Washington, Mich., 



[Cooley]. 

 Graphephorum melicoides var. major A. Gray, Amer. Acad. Sci. Proc. 5: 191. 



1861. Based on Dupontia cooleyi A Gray. 

 Graphephorum melicoideum cooleyi Scribn., Mem. Torrey Bot. Club 5: 53. 



1894. Based on Dupontia cooleyi A. Gray. 

 Trisetum melicoideum cooleyi Scribn., Rhodora 8: 87. 1906. Based on 



Dupontia cooleyi A. Gray. 

 Trisetum melicoides var. majus Hitchc., in Robinson, Rhodora 10: 65. 1908. 



Based on Graphephorum melicoides var. major A. Gray. 

 Graphephorum cooleyi Farwell, Mich. Acad. Sci. Papers 1: 88. 1921. Based 



on Dupontia cooleyi A. Gray. 

 (7) Trisetum montanum Vasey, Bull. Torrey Bot. Club 13: 118. 1886. No 



locality cited. [Type, Las Vegas, N.Mex., G. R. Vasey in 1881.] 

 Trisetum argenteum Scribn., U.S.Dept.Agr., Div. Agrost. Bull. 11: 49. f. 8. 



1898. Not T. argenteum Roem. and Schult. Silverton, Colo., Shear 1214. 

 Trisetum shearii Scribn., U.S.Dept.Agr., Div. Agrost. Circ. 30: 8. 1901. 



Based on T. argenteum Scribn. 

 Graphephorum shearii Rydb., Bull. Torrey Bot. Club 32: 602. 1905. Based 



on Trisetum shearii Scribn. 

 Trisetum canescens var. montanum Hitchc., Biol. Soc. Wash. Proc. 41: 160. 



1928. Based on T. montanum Vasey. 

 Trisetum montanum var. pilosum Louis-Marie, Rhodora 30: 212. 1928. 



Caroles, N.Mex., Standley 4536. 

 Trisetum montanum var. shearii Louis-Marie, Rhodora 30: 213. 1928. Based 



on Trisetum shearii Scribn. 

 (3) Trisetum orthochaetum Hitchc., Amer. Jour. Bot. 21: 134. f. 3, 1934. 



Lolo Hot Springs, Bitterroot Mountains, Mont., Chase 5129. 

 (9) Trisetum pennsylvanicum (L.) Beauv.; Roem. and Schult., Syst. Veg. 2: 658. 



1817. Based on Avena pennsylvanica L. 



A vena pennsylvanica L., Sp. PI. 79. 1753. Pennsylvania, Kalm. 

 ? Avena caroliniana Walt., Fl. Carol. 81. 1788. South Carolina. 

 Avena palustris Michx., Fl. Bor. Amer. 1: 72. 1803. Carolina and Georgia, 



Michaux. 

 Aira pattens var. aristata MuhL; Ell., Bot. S.C. and Ga. 1: 151. 1816. South 



Carolina. 

 Avena pennsylvanica MuhL, Descr. Gram. 185. 1817. Pennsylvania and 



North Carolina. No authority cited but the Muhlenberg specimen belongs 



to the Linnaean species. 

 Trisetum palustre Torr., Fl. North, and Mid. U.S. 126. 1823. Based on 



Avena palustris Michx. 

 Arrhenatherum pennsylvanicum Torr., Fl. North, and Mid. U.S. 1: 130. 1823. 



Based on Avena pennsylvanica L. 

 ? Arrhenatherum kentuckense Torr.; Steud., Nom. Bot. ed. 2. 1: 135. 1840. 



North America. Name only. l( Avena pennsylvanica Muhl." doubtfully 



cited as synonym, 



