206 PUACE.E. 



mostly ill }xiirs, sprciKlinjif or cvt-ii rofloxod witli a spoil, cy eullus in 

 the Jixilri, tlio largest fuw-llowt'ivil. i)-(\ ciii. loii;^'. braucliiiig about 

 1 cm. from llui base, em^jty gliimcs nearly ecuial. scabrous on tho 

 keels, l-nerved, 8-10 iiiiii. lon^j;; lloral uluiue spotted, smooth, the 

 apex scabrous, 7-8 mm. long, lateral awns 10-15 mm. long, tho 

 middle one a very little longer. 



Western Texas, Ihirard; Arizona. Tuiniirii IS,"). 



'I'.). A. palustris Vasey, Cat. (ii'ani. V . S. '■):) (ISS,")). A. I'lryata 

 var. jxiliis/rift Cliaitm. Fl. S. States o')5 (18<iO). 



("ulms branching near the base, 00-150 cm. high. SheatlKsclose; 

 ligule very short; blades tlat or involute, rigid. lO-'iO cm. long.-;} 

 mm. wide. l*aiiicl(( loose, interni[>te(l, iJO-TO em. long. Emjity 

 glumes comi)ressed, keeled, nearly ecpial or the second longer, 1- 

 nerved. 7-9 mm. long; iloret 5-0 mm. long, the lateral awns 12-15 

 mm. long, the central a little longer, and when dry spreading more 

 than the others. 



Mississippi, Trari/; Northeast Florida. Ciir/iss 3425. 



I'inc-barrens, West Florida and South Alabama, 



U. A. setifolia H. H. K. Xov. CJen. et Sp. 1:123 (1815). 

 Cha>tariat<efifnU<( \\. &. S. Syst. 2 : ;{1)0 (1817). 



A tufted branching perennial grass. 30-00 cm. high. Sheaths 

 shorter than the internodes; lower leaf-blades nnmerous, narrow, 

 involute, 15-20 em. long, those of the culm ;> to 4 in number. 

 Panicle but little exsertcd, often included at the base, rather thin 

 and spikelike, 12-15 cm. long, branches compound, 14.5 mm. 

 from each other, 3-4 cm. long: empty glumes scabrous on the keel, 

 abruptly pointed when spread, l-nerved, first 4-0 mm. long, second 

 0-8 mm. long; lloral glume scabrous, linear-lanceolate, 5-0 mm. 

 long, the awns diverging, nearly equal, or the middle one slightly 

 shorter or longer, 8-15 mm. long. 



AEexico, Palmer 501, 709. 



Also found in Jirazil. 



25. A. fasciculata (H. & S.) Torr. Ann. Lye. N. Y. 1:154 

 (1824). Chcpfaria fascicuhtta U. k S. Syst. 2 : Mant. 578 (1817). 

 A. purpurea ^wii. Trans. Am. Philos. Soc. (II.) 5:145 (1837). 



