13 



Coinniou in low ground about water courses and even in shallow water, reai'liing to 

 a height of 5 or 6 feet. It is a very prolifie species, eagerly eaten by domestic 

 animals. The seeds, which become dark at maturity, are much eaten by birds. 



Panicum crus-galli muticum Vasey, Contr. IT. S. Nat. Herb. 3: 37 (1892). 



Saltillo, State of Coahuila, 380 E. Palmer, September, 1898. 



Panicum fasciculatum Swartz, Prodr. Veg. Ind. Occ. 22 (1788). 



Rosario, State of Sinaloa, 1834 J. N. Eose, July 24, 1897. 



Panicum fimbriatum (Link) Kunth, Rev. Gram. 1: 33 (1835). {Dicjildria fimhridhi 

 Link, Mort. Berol. 1: 226 (1827); Syntherisma fimbriaia Nash, Bui. Torr. Bot. 

 Clul), 25: 302(1898).) 



Colima, 9 E. Palmer, July, 1897, in a deep, shady ravine; Topolobampo, State of 

 Sinaloa, 234 E. Palmer, September, 1897; Saltillo, State of Coahuila, 387 E. 

 Palmer, September, 1898. 



Panicum fuscum Swartz, Prodr. Veg. Ind. Occ. 23 (1788). 



Topolobampo, State of Sinaloa, 250 E. Palmer, September, 1897, in an opening on a 

 very stony mountain slope. 



Panicum hallii Vasey, Bui. Torr. Bot. Club, 9: 61 (1884). 



Durango, State of Durango, 525 E. Palmer, August, 1896. 



Panicum hirticaulum Presl, Rel. Ilaenk. 1: 308 (1830). 



Between Agnacata and Dolores, Territorio de Tepic, 3351 J. N. Rose, August 6, 1897; 

 near Acaponeta, 1889, 3281 J. N. Rose, July 29, 1897; between Rosario and Aca- 

 poneta 1883, 1878 J. N. Rose, July 28, 1897 (the last four numbers are depauperate) ; 

 Colima, 14, 143, 145 E. Palmer, July, 1897; Topolobampo, State of Sinaloa, 249, 

 251 E. Palmer, September, 1897; near Pachico, State of Chihuahua, 6297 E. W. 

 Nelson, August 25, 1899; between Casas Grandes and Sabinal, State of Chihuahua, 

 6355 E. W. Nelson, September 4-5, 1899. 



Panicum h.olciforme Steud. Nom. ed. 2, 2: 257 (1841). 



Durango, State of Durango, 253 bis E. Palmer, June, 1896. 



*Panicum inflatum Seribn. & Smith, \J. S. Dept. Agr. Div. Agros. Cir. 16: 5 (1899). 



Gravelly banks near Jalapa, State of Vera Cruz, altitude 1,250 m., date not given, 

 7883 C. G. Pringle, 1899. 



Panicum insulare (L.) Mey. Prim. Fl. Esseq. 60 (1818). 



Durango, State of Durango, 715 E. Palmer, September, 1896. 



Panicum lanatum Rottb. Act. Lit. Univ. Hafn. 1: 269 (1778). (P. leucophicum 

 H. B. K. Nov. Gen. et Sp. PI. 1: 97 (1815).) 



Between Coneepcion and Acaponeta, 1900 J. N. Rose, July 29, 1897. 



*Panicum laxiflorum Lam. Encycl. 4: 748 (1797). (P. xulapense Kth.?) 



A low, densely csespitose perennial, 1.5 to 3 dm. high, with crowded, lanceolate, 

 acute, pilose leaves and spreading, ovate panicles 4 to 5 cm. long. Culms much 

 branched near the base, glabrous; nodes bearded with spreading hairs; sheaths 

 pilose with soft, spreading, or reflexed hairs; ligule a dense fringe of hairs 

 about 1 mm. long. Leaves 3 to 6 cm. long, 6 to 10 mm. wide, pilose on both 

 surfaces with soft hairs, ciliate on the margins with long, spreading, papillate 

 hairs. Axis of the panicle glabrous or pubescent. Spikelets oblong, obtuse, 2 

 mm. long; first glume broadly obtuse, about one-third the length of the spikelet, 

 3-nerved; the second and third glumes prominently 7-nerved, pubescent, with 

 short, spreading hairs between the nerves. 



Gravelly banks near Jalapa, State of Vera Cruz, altitude 1,250 m., 8083 C. G. Pringle, 

 March 29, 1899; 1752 C. L. Smith, 1894. 



Nearly identical with the grass from the Southern States which by recent authors 



has been referred to P. laxiflorum Lam. 

 Panicum maximum Jacq. leones PL Rar. 1: /. 13 (1781-1786). 

 San Francisco, State of Vera Cruz, 1409 C. L. Smith, 1894. 



