882 LV. 



TRIBE I. ANDROPOGONE&. 



Spikelets usually geminate or in threes, polygamous, the middle fertile, the 

 lateral $ or neuter, very rarely all fertile, in a spieate or branched, or sometimes 

 digitate panicle, more rarely in a spieate raceme. Fertile spikelets composed of a 5 

 flower accompanied by a lower $ or neuter one. Glumes sub-equal, often longer 

 than the $ flower, or rarely unequal, the lowest largest. Glumelles membranous, 

 rarely cartilaginous ; lower glumelle of the 3 flower facing the upper glume. 

 Stamens 3. Stigmas usually long, protruding under or at the top of the flower. 

 Caryopsis with a punctiform hilary spot. 



PRINCIPAL GENERA. 



* Andropigon. * Erianthtis. * Sacchnrum. Ischcemum. 



Imperata. Tripsacnm. * Sorghum. 



TRIBE II. PANICE2B. 



Spikelets all fertile, in a spieate or branched, sometimes digitate panicle, com- 

 posed of one $ flower accompanied by one lower $ or neuter flower. Lower glume 

 smaller than the upper, often minute or arrested. Glumelles usually cartilaginous, 

 shining ; lower glumelle of the 8 flower facing the upper glume. Stamens 3. 

 Stigmas usually long, protruding at or under the top of the flower. Caryopsis 



with a punctiform hilary spot. 



% t 



PRINCIPAL GENERA. 



Reimaria. Oplismemis. * Pennisetum. Paspalum. * Setaiia. 



* Penicillaria. * Pjmicum. Dighwia. Tragus. 



TRIBE III. ORYZE^J. 



Spikelets all fertile, in a raceme or panicle, 1 -flowered, often with arrested 

 glumes, or 2-3-flowered, the lower flowers with 1 glumelle, neuter, the terminal only 

 fertile. Glumelles parchment-like, stiff. Stamens usually 6, often 3 (Hygroryza, 

 Ehrharta, Leersia), or 4 (Microltcna, Tetrarrhena), rarely 1 (Leersia). Stigmas diver- 

 gent, protruding at the sides of the flower. Caryopsis with a linear hilary spot. 



PRINCIPAL GENERA. 



Pharus. Zizania. Leersia. 



Ehrharta. * Oryza. Anomochloa. 



TRIBE IV. PHALARIDEM. 



Spikelets 5 , monoecious or polygamous, in a spieate panicle or in spikes, some- 

 times with 2 flowers, 5 $ or $ ; sometimes with 2-3 flowers, the upper only fertile. 

 Glumes usually equal, longer than or as long as the flower. Glumelles more or less 



