15^ 



Tribe 15. Festuceae Grlumes more or less resembling the valves 

 in general appearance. Fruiting florets 2 to many, very rarely 1, often 

 much exserted from the glumes. Valves o-or more nerved, very rarely 

 3-or 1-nerved, then with the side nerves not submarginal nor with the 

 spikelets in 2-ranked spikes ; awns if present terminal or subterminal, 

 never kneed. 



Melica ; Fingerliuthia ; Poa ; Festuca ; Bromus ; Brachypodium ; 

 Stiburus ; Vulpia. 



Tribe 16. Hordete. Spikelets sessile, singly or in clusters on the 

 notches of a simple spike, sometimes partially sunk in hollows of the 

 same. Florets 1 or more. 



Lolium. 



Tril^e 17. Pharete. Spikelets heteromorphous, unisexual, monoe- 

 cious, the male small. Floret 1. One or both glumes of the male 

 often minute or obsolete. Fruiting valve coriaceous to cartilaginous. 

 Lodicules 3. Stamens 3-6. Blades flat, broad, many nerved, often 

 petioled. 



Olyra. The only South African genus. 



Tribe 18. Bambusew. Spikelets all of one kind. Florets few to 

 many, rarely 1. Glumes distinct or indistinctly differentiated, t e., 

 passing below into more or less numerous bracts and sometimes having 

 like them flowering branchlets or spikelets in their axil, and at the 

 same time resembling the valves. Valves subherbaceous to sub- 

 coriaceous, 5-to many nerved, generally awnless. Lodicules usually 3. 

 Stamens 3, 6 or more. Styles 2 or 3. Shrubs or trees. Blades flat, 

 many nerved, articulated on the sheath, 



Arundinaria. 



KEY TO GENERA. 



SERIES I. 

 TRIBE 1. ANDROPOGONE.^. 



Spikelets all alike. Racemes in compound panicles 



(except Pollinia) joints of the rhachis slender. A. 



The two spikelets of each pair differing in sex and 

 structure (in South African species, except in 

 Ischpemum fasciculatum , where the difference 

 is limited to the lower glume). B. 



A. 



Racemes in a spiciform silky panicle ; rhachis not 



fragile. Spikelets awnless. Imperata. 



Racemes in large much branched silky panicles, rhachis 



fragile. Spikelets awnless, Sacchabum. 



