6 CLXXIII. GBAMINE^E. (J. D. Hooker.) 



*' Eiichilla not produced beyond gl. II. 



f Spikelets articulate on their pedicels, or gl. I and II separately deciduous, 

 or pedicel articulate in the middle. 

 Spikelets oblong; gl. I and II 3-nerved, III 5-nerved, 



awnless 67. CYATHOPUS. , 



Spikelets very narrow; gl. I and II 3-nerved, III faintly 



1 3-nerved, usually avvued ..... 68. GARNOTIA. 

 Spikelets compressed ; gl. I and II subequal, avvned, 



nerved . . . 69. POLYFOGON. 



Spikelets subglobose ; gl. I nerveless, II and III 1- 



nerved, awnless 70. SPH^ROCARYU.M. 



ft Spikelets and pedicels inarticulate, gl. I and II persistent. 

 Gis. all awnless ; I and II 1-nerved, pericarp of grain 



loose 71. SPOROBOLUS. 



Gl. I and II subequal, 1-nerved, awnless, awn of III 



dorsal or 72. AGROSTIS. 



Gl. I and II unequal, awuless, 1-uerved, awn of III ter- 

 minal '73. MUKHLMXBKKGI A. 



(il. I and II 3-nerved, awnless, base of III penicillate 



with long hairs 74. CALAMAGROSTIS. 



** Rachilla produced beyond gl. Ill usually peni- 

 cillate with long, silky hairs ; gl. I and II 3-nerved. . 75. DEYEDXTA. 



Tribe VII. AVENE.E. Spikelets 2- or more fld., panicled, very rarely 



spicate, or panicle subspicil'orm ; fl. gls. usually awned, awn geni<-ulate 



and often twisted, rarely straight or ; rachilla produced or not beyond 



the upper fl. gl. 



Subtribe I. AIRE/E. Spikelets 2-fld. ; gls. membranous; rachilla not 



produced. 



Gl. I acute, many-nerved; fl. gl. long-ciliate . . . 71 ERIACHNE. 



Spikelets minute ; rachilla and keel of fl. gl. ciliate . . 7V. /JKJVKJ.KIA. 



Spikelets awnless ; gl. Ill largest 2-sexual, IV male . 78. COELACHNE. 



Spikelets 3-nate ; gl. I and II awnless, III male, cleft, 



tiwned in the cleft 79. TRISTACHTA. 



Gl. I and II awuless, III and IV bisexual, hyaline, dor- 

 sally awned . 80. AIRA. 



Subtribe III. EUAVENEJE. Spikelets 2- or more fld.; rachilla pro- 

 duced. 



Spikelets 2-fld., both bisexual, avvned 81. DESCHAMI-MA. 



JSpikelets 2-fld., lower fl. bisexual awnless, upper male 



or neuter awned . . . . . . . 81*. HOLCUS. 



Spikelets 2-6 -fld. ; fl. gl. awued, awn subtermiual or 



dorsal 82. AVENA. 



Spikelets 3- or more-fld. ; fl. gl. deeply cleft, awned in 



the cleft ......... 83. DANTTIO.MA. 



Tribe VIII. CHLORIDES., Spikelets 1- or more-fld., ^-seriate (some- 

 times very distantly) and secund on an inarticulate spike or on the spici- 

 i'orm branches of a slender panicle ; fl. all or the lower only bisexual ; 

 rachilla produced or. not beyond the upper fl. gl. 



* Spike solitary, terminal (see also Chloris). 



Spikelets rniuute, 1-fld., awnless St. MicROCHLOA. 



Spikelets 1-2 -fld., in pedicelled deciduous articulate 



clusters, awned 85. GKACILEA. 



Spikelets 1-2 fld., in sessile inarticulate clusters, awned . '8'?. KNTRROPOG-OX. 

 Spikelets many -fld. ; fl. gl. 3-awned ..... 7. TuiruGON. 



