597 



smaller one, 3 — many-bristled at the apex, or a simple or 3-cleft 

 awn inserted at the joint, base often twisted, in many veiy long : 

 caryopsis compressed oylindric, enclosed by the floret. 



GElsrUS XYII. AEISTIDA. 

 OTviandria Di^ynla. Sex: Syst: 



Deriv. From Arista, an ear of com. 



G^N. Chae. Panicle sometimes much impoverished, racemiform : 

 spikelets 1 -flowered, ripe floret separating,^ at the joint from the 

 glumes, callus obconical, bearded : glumes 2, unequal, very often 

 muticous : palese 2, lower coriaceous, awned at the apex : awn 

 3-parted or cleft, sometimes jointed at the base : upper palese scarcely 

 exceeding the scales, muticous : filaments adnate through the base 

 to the stalk of the ovary : ovary stalked, glabrous : styles terminal, 

 short, stigmas plumose : scales 2, entire, adnate to the stalk of the 

 ovary : caryopsis terete, involved in the palese, free. 



(1) A. DEPEESSA. (Rett.) 



Ident. Eetz. obs. iv. p. 22. — Eoxb. 1. c. p. 351. 



Spec. Chae. Culm 9 — 18-inches, ascending or procumbent : 

 leaves rather glaucous : rays of the dense panicle rather contracted 

 and nodding. 



Peninsula, in dry barren soil. A troublesome grass : the flowers, 

 which fall off easily, are like barbed arrows (J)aheli.) 



(2) A. Hystrix. (Linn.) 



Ident. Spreng. syst. I. 267. — Eoxb. 1. e. p. 350. 



Syn. Chsetaria hystrix;, JBemw. 



Spec. Char. Eoot creeping, stoloniferous, branched, culms 

 diffuse, ascending, 10 — 20-inches : sheaths smooth, striated, bearded 

 in the mouth : leaves rather glaucous, spreading in twb ways, con- 

 volute, smooth, roughish above : panicle rigid, divisions spreading, 

 angular, bearded at the axis. 



Dry barren soil in the Peninsula. Malabar. 



(3) A. sEiACBA. (ReU.) 



Ident. Eetz. obs. iv. p. 22. — Eoxb. 1. c. p. 349. 



Spec. Chab. Ehizome thick : culms erect, firm, 2-feet, usually 

 branched, tumid at the nodes : sheaths smooth : leaves filiform, 



