882 LV. GEAMINE^. 



Tkibe I. ANDBOPOGONE^. 



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

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

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

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

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

 rarely cartilaginous ; lower glumelle of the 5 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. 



PEINCIPAL GENERA. 



* Andropogon. * Erianthiis. * Sacebarm n. Ischoemum. 



Imperata. TjiEsacuni. *SorgLuni. 



Tkibe II. PANIGE^. 



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

 posed of one 5 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 3 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. 



PEINCIPAL GENEEA. 



Reimaria. Oplismeniis. * Pennisetum. Paspalum. ' Setaria. 



* PenJcillaria. * Panicum. Digitaria. Tragus. 



Tkibe III. OBYZE^. 



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

 glumes, or 2-3-flowered, the lower flowers with l-T^fagielle, neuter, the terminal only 

 fertile. Glumelles parchment-like, stifi'. Stamens usually 6, often 3 {Hygroryea, 

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

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



PEINCIPAL GENEEA. 



Pharus. Zizania. Leersia. 



Ehrharta. * Orjja. Anomochloa, 



Tkibe IV. PHALARIDEJE. 



Spikelets 5 , moncecious or polygamous, in a spicate 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 



