A\PI{()P()(i()NK.K. 57 



lets mostly torminiil in ))iiirs or fours. itanicU'tl, with few or niuiiy 

 brauelic'S, ()-13 cm. loii<r. the white liuirs lon^'er than the si)ikelets 

 and |>artially concealing them. On the ses.sile s[)ikelets first glume 

 ovate-lanceolate, witli a vertical iifroove on the hack. 8-ncrve(l, 

 inarj(ins involute, keeled. 4 mm. ionir; second ovate, acute, mem- 

 branous, keeled. ;5-iierved: tlie hent awn of the fourth 15--i5 mm. 

 lon^'. Stamen 1 . Pedicels us lon<r as the si)ikelets ; tii-st glume lance- 

 elliptical. 11-nerved, margins involute, keeled; second smaller. 



Texas, IJ. S. Dr/if. Jijn'ful. 199 from Keverchou and Neallcy; 

 Arizona, PviiKjIe. 



'I'exas to Arizona. 



Var. barbinodis (Lag.) TIack. D. C. Monog. Phaii. G : (1889). 

 A. barbinodis Lag. (len. et S[>. 1:^} (181(5). A. ttrf/otifeiis D. ('. 

 Cat. llort. Monsp. 77 (ISl.'J). SdrrJidnnii (/ri/r/i/niiH Hrous. El. 50. 

 Erianthua xaceharoides Willd. Enum. 40 (ISO'.t). 



Sheaths densely bearded at the nodes; ligule .'J-4 mm. long; 

 blade greeu or subglaucous, smooth or sparingly pilose below, 20-40 

 cm. long. 4-7 mm. wide; panicle 10-15 em. long, sliowy. 



Mexico. Pahnrr 1:547. 



Var. genuinus Hack. D. ('. Monog. I'han. (;:(ISS9). 



Glaucous, slender, hairs on the nodes few and short. Pedicel- 

 late spikelcts "l.b mm. long, of 'I glumes. Sessile spikolets 3-5 mm. 

 long; first glume flattened, 3 mm. long, 9-uerved; secoml 3 mm. 

 long, awn slender, 9-18 mm. long. 



Mexico, PrincjJe 31(5. 



Vur. submuticus Hack. 1. e., var. />/m/?Av Vasey ined. Xodes 

 smooth, spikes 1.5-3 cm. long, in about 10 flusters of 4-10 each, 

 all racemose on a rachis about 10 cm. long; first glume of pedicellate 

 spikelet 5-nerved, fertile floret 3 mm. long. 



Texas, Nenllcf/ in herb. Scribner. 



Var. glaucus (Torr.) Scribn. .1. glaurus Torr. Ann. Lye. N. Y. 

 1:157 (18->4). A. mrrharmdes. var. Torreanvs Hack. D. C. 

 Monog. Phan. : 495 (1889). A. Torreanus Steud. Nomencl. 

 Ed. 2. 93 (1841). 



East 'J^exas, IlaU 845, Cnrtiss 3633, Wright 2102 Drummond 

 313. 



