49 



12. Panicle at length rather lax. Blades mostly flat, 3-4 lin. 



broad S. rehmanni. 



Spikelets crowded on the branchlets, often secund. Blades 

 narrower, convolute S. fimbriatus. 



STIPA. 



Annual. Blades fine. Panicle spike-like. Awns long, 

 intertwisted S. tortilis. 



Perennial. Blades flat. Panicle large. Awns short, 

 twisted at base only S. dregeana. 



TRAGUS. 



Uppermost internode long exserted. Anthers 1 lin. long. 



T. koelerioides. 

 Uppermost internodes enclosed. Anthers ±-^ lin. long. 



T. raeemosus. 



TRICHOLAENA. 



1. Spikelets glabrous T. glabra. 



Spikelets pubescent or villous 2 



2. Upper glume and lower valve 2-3 lin. long, gibbous at 



or below the middle 3 



Upper glume and lower valve 1 lin. long or rather longer, 

 not gibbous 5 



3. Blades setaceous T. setifolia. 



Blades flat, rarely convolute 4 



4. Spikelets silky, villous T. rosea. 



Spikelets adpressedly or scantily hairy T. brevipila. 



5. Spikelets loosely villous. Lower glume about £ as long 



as spikelet T. capensis. 



Spikelets pubescent. Lower glume minute ... T. arenaria. 



TRICHOPTERYX. 



1. Spikelets 2-3 lin. long. Valve of male floret long bearded 



below the middle T. dregeana. 



Spikelets 3-7 lin. long. Valve of male floret pubescent, 

 not bearded except at the callus 2 



2. Suffrutescent. Valve of male floret sub 7 nerved ... 



T. ramosa. 

 Not suffrutescent. Valve of male floret 3 nerved ... 3 



3. Valve of hermaphrodite floret 7-5 nerved. Callus 



2-toothed at the base T. simplex. 



Valve of hermaphrodite floret distinctly 9 nerved. Callus 

 very acute T. flavida. 



