876 POACE.H. 



houriiij,' Ix'twoi'ii tlicin u liairliki* iiwn; empty glumes (hiuuI or sub- 

 equal, mucroniito or obtuse. 3.5-4 niiu. lon^', bispid on tbo keels, 

 lirat narrowly oblong, H-nervcd, second oboviito. .'j-nerveil; florul 

 glume of tirst lloret narrowly oval, tubereulute-roughened, 3.5 mm. 

 long. 3-norved, termimiting in two aeute teetb and bearing astniiglit 

 scabrous awn a little below tlic tip. 'i mm. long, teetb of second 

 and tbird florets prolonged into slender setie, awn twisted a d bent 

 one-third the way from tbe ti|) and 3-4 mm. long; palea about 

 two-tliirdu as long as its glume, (irain smooth. 



Named for the late Klihu Hall, in whose Texan collection 

 (IHT*^) it was distributed under No. TOO, mi.xed with Trinvfinin'/ou' 

 gal inn Kth. ( 7'. interruption Huckl.), No. WhU)* of (*urtiss's distri- 

 bution of 1S.S3, to which it is closely allied and which it much re- 

 sembles in habit, but frotu wbieb it dilTers essentially in its broader 

 and obtuse outer glumes, and in having the lowest awn straight and 

 shorter than the others. 



'i'exas (Brazos County), XenUey in 1883. 

 C. T. elongatum (II. H, K.) Kuuth, Uev. Gram. 1: 101 (1820). 

 AiriiK rloiif/dfd II. a K. Nov. Gen. et Sp. 1 : 148 (181,-)). 7'. ///- 

 tirmptum Buckl. I'roc. Acad. Phila. 100 (ISOi*). T. CaJifornicum 

 V'asey. 



Culms slender, brandling, 20-50 om. high. Sbeatlis frequent- 

 ly in(;luding tbe base of tbo panicles; blades flat aiul narrow, those 

 of the culm 2-7 em. long, often puberuloiis. Panicle simple, 4-10 

 cm. long, 1 cm. broad, dense or interrupted with spikelike branches. 

 Many of the spikelets 2-3-flowered, sessile on the brancdies. where 

 there are 5-7, one at a node, on alternate sides of the slender rachis. 

 Empty glumes subequal, mucronate or acute, ovate-lanceolate. 3.5- 

 4.5 mm. long, first 3-nerved, second 5-nerved, nerves j)ron)inent; 

 floral glume scabrous, elliptical-lanceolate, 4-5 mm. long, 5- (some- 

 times 3-4-) nerved, bearing a bent awn one- third or two-fifths the 

 way below the acuminate or cuspidate points; palea narrow, hya- 

 line, bifid, about half the length of its glume. Grain smooth, 3 

 mm. long. 



Arizona, PringU; Lower California, Ormitt. 



Texas, Arizona, New Mexico, southern California. 



