444 I'OACHE. 



j. Floml glumes I-IJ-iutvihI. llowcis perfect, 

 or the upper one stainiiuite (»r rudimeii- 



turv (k) 



k, Wiiys spiriilly arninged (1) 



1. Panicle narrow, spiki'letrf small, 

 conical, 2— i-tlo.vered, racliilla ar- 

 ticulate no 



1. Panicle variable, spikelets not 

 conical, usually (len.sely many- 

 flowered, racliilla usually continu- 

 ous '. ... Ill 



k. IJays distichous (m) 



m. Panicle miri'ow, spikelets 'i-A- 

 llowered. empty <rlumes much 

 longer than the tloral. . . . 101) 

 m. Empty glumes shorter or but lit- 

 tle longer than the floral glumes, (n) 

 u. I'anicle narrow, spikelets '^-4- 

 flowered, second empty glume 

 broader and longer than the 

 floral glumes, which are 

 broadly obtuse, awnless. . .112 

 n. Panicle s])ikelike. second 

 empty glume not broader or 

 longer than the floral glumes. 113 

 u. Panicle ditl'use, s{)ikelets 

 small, 2-4-flowered. emjity 



glumes subeqmd 114 



j. Floral glumes :5-5- to many-nerved, with 

 two or more of the upper glumes emi)ty 

 and closely enveloping each other, spike- 

 lets but little compressed (o) 



o. Stamens 3, lodicules 1, empty glumes 



usually clavate 115 



o. Stamens 1-2, lodicules 2, upper em])ty 

 chimes not clavate. . . , . . .116 



