MANUAL OF THE GRASSES OF THE UNITED STATES 809 



(4) Bouteloua rigidiseta (Steud.) Hitchc, Jour. Wash. Acad. Sci. 23: 453. 



1933. Based on Aegopogon rigidisetus Steud. 

 Aegopogon rigidisetus Steud., Syn. PI. Glum. 1: 146. 1854. Texas, Drum- 



mond. 

 Bouteloua texana S. Wats., Amer. Acad. Sci. Proc. 18: 196. 1883. Texas, 



Berlandier 1535, Drummond 340, 374. 

 Polyodon texanus Nash, in Small, Fl. Southeast. U.S. 138, 1327. 1903. Based 



on Bouteloua texana S. Wats. 

 (12) Bouteloua rothrockii Vasey, Contrib. U.S. Natl. Herb. 1: 268. 1S93. 



Cottonwood, Ariz., Rothrock 347. 

 (9) Bouteloua simplex Lag., Var. Cienc. 2 4 : 141. 1805. Peru. 



Chloris procumbens Durand, Chlor. Sp. 16. 1808. Grown at Madria, seed 



said to come from the Philippine Islands (collected by N£e) where the 



species is not known to occur. Probably from South America or Mexico, 



which regions Nee visited. 

 Chloris filiformis Poir., in Lam., Encycl. Sup. 2: 237. 1811. Grown at 



Paris, the source unknown. 

 Chondrosium procumbens Desv.; Beauv., Ess. Agrost. 41, 158. pi. 9. f. 7. 1812. 



Based on Chloris procumbens Durand. 

 Chondrosium humile Beauv., Ess. Agrost. 41, 158. 1812. Name only. 

 Chondrosium tenue Beauv., Ess. Agrost. 41, 158. 1812. Name only. 

 Atheropogon procumbens Jacq., Eclog. Gram. 2: 16. pi. 12. 1813. Based 



on Chloris procumbens Durand. 

 Bouteloua prostrata Lag., Gen. and Sp., Nov. 5. 1816. Mexico. 

 Chondrosium humile H.B.K., Nov. Gen. and Sp. 1: 175. pi. 56. 1816. Ecua- 

 dor, Humboldt and Bonpland. 

 Chondrosium tenue Beauv.; H.B.K., Nov. Gen. and Sp. 1: 176. pi. 57. 1816. 



Mexico, Humboldt and Bonpland. 

 Chloris tenuis Poir., in Lam., Encycl. Sup. 5: 614. 1817. Based on C. fili- 

 formis Poir., p. 237, not C. filiformis Poir., op. cit. p. 238. 

 Actinochloa procumbens Roem. and Schult., Syst. Veg. 2: 417. 1817. Based 



on Chloris procumbens Durand. 

 Actinochloa humilis Willd.; Roem. and Schult., Syst. Veg. 2: 417. 1S17. 



Based on Chondrosium humile H.B.K. 

 Actinochloa simplex Roem. and Schult., Syst. Veg. 2: 418. 1817. Based on 



Bouteloua simplex Lag. 

 Actinochloa tenuis Willd.; Roem. and Schult., Syst. Veg. 2: 418. 1817. Based 



on Chondrosium tenue H.B.K. 

 Actinochloa prostrata Roem. and Schult., Syst. Veg. 2: 419. 1817. Based 



on Bouteloua prostrata Lag. 

 Eutriana humilis Trim, Gram. Unifl. 239. 1824. Based on Actinochloa 



humilis Willd. 

 Eutriana tenuis Trim, Gram. Unifl. 240. 1824. Based on Actinochloa tenuis 



Willd. 

 Atheropogon humilis Spreng., Syst. Veg. 1: 293. 1825. Based on Chondrosium 



humile H.B.K. 

 Cynodon procumbens Raspail, Ann. Sci. Nat., Bot. 5: 303. 1825. Based on 



Chondrosium procumbens Desv. 

 Chondrosium prostratum Sweet, Hort. Brit. 1: 455. 1826. Based on Bouteloua 



prostrata Lag. 

 Chondrosium simplex Kunth, Rev. Gram. 1: 94. 1829. Based on Bouteloua 



simplex Lag. 

 Bouteloua tenuis Griseb., Abh. Ges. Wiss. Gottingen 19: 211. 1874. Based 



on Chondrosium tenue Beauv. 

 Bouteloua humilis Hieron., Bol. Acad. Cienc. C6rdoba 4: 495. 1882. Based 



on Chondrosium humile Beauv. 

 Bouteloua pusilla Vasey, Bull. Torrey Bot. Club 11: 6. 1884. Kingman, 



N.Mex., Vasey. 

 Bouteloua brachyathera Phil., An. Mus. Nac. Chile Bot. 8: 85. 1891. Tarapaca, 



Chile. 

 Bouteloua rahmeri Phil., An. Mus. Nac. Chile Bot. 8: 85. 1891. Tarapaca, 



Chile. 

 Bouteloua procumbens Griffiths, Contrib. U.S. Natl. Herb. 14: 364. 1912. 



Based on Chloris procumbens Durand. 

 Bouteloua simplex var. rahmeri Henr., Med. Rijks Herb. Leiden no. 40: 66. 



1921. Based on B. rahmeri Phil, 



