158 



1 Several to many hermaphrodite florets in each 

 spikelet. Seeds free within the delicate 

 dehiscing or rupturing pericarp. 4 



2 Glumes shorter than the glabrous, sub-chartaceous 



valve. Cynodon. 



2 Glumes longer than the ciliate membranous valve. Migrochloa. 

 3 Upper glume generally with a stiff bristle from 

 the back. Lowest 2 florets barren, or the 

 second male, the third hermaphrodite. Ctekium. 



3 Spike solitary, terminal, spikelets awnless, lowest 



floret herniaphrodite. Haupeciiloa. 



8 Spikes 2-to many, digitate or fascicled, Spikelet 



awned or awnless. Lowest flcret hermaphrodite. Ohloris. 

 4 Spikes terminated by a spikelet. Eleusine. 



4 Point of therhachisof the spikes, naked, projecting. Dactyloctentum. 

 5 Spikelets sub-sessile in dense spiciform panicles. 

 Florets distinctly (often long) exserted from 

 the glumes. Valves long and finely awned; 

 side nerves not excurrent. Blades constricted 

 and rounded at the base. Leptocarydium 



5 Spikelets sub-sessile in racemous'y arranged erect 

 or spreading fa'se spikes. Florets equalling 

 or slightly exceeding the glumes, or much 

 shorter. Valves very shortly awned. Side 

 nerves not excurrent. Blades not constricted 

 at the base Crossotropis. 



5 Spikelets usually distinctly pedicelled, often in 

 compound and dense panicles. Valves finely 

 awned ; side-nerves excurrent into long or 

 short bristles. Triraphis. 



TRIBE XIL PAPPOPHORE.^. 

 Not represented in Natal. 



TRIBE XIIl. ORYZE^. 



Fruiting valve membranous to sub- herbaceous, smooth, 



with 2 minute nerveless emi)ty valves below it. Potamophila. 



Fruiting valve chartaceous, rigidly ciliate (in the 



African species) without empty valves below it. Leersia. 



TRIBE XIV. PlIALARIDE^. 



Both empty florets or at least the upper larger than 



the fertile, exceeding or equalling tlie glumes. Ehrharta. 



Empty florets reduced to minute scales, enclosed 



together with the fertile floret by the glumes. Phalaris. 



