18. Andbcpogon.] 



97. GRAMINEM 



spikes wlrcti are simple or branched and clustered solitary or 

 half verticellate on the rachis of a diffuse panicle, rarely 

 rachis abbreviated or spikes digitate (when it resembles 

 Ischeemum), or panicle contracted. Sessile spikelet 2-sexnal, 

 glumes 4, outer largest mnticous 3-many-nerved, median 

 nerve sometimes evanescent, II empty keeled rarely with a 

 straight awn ; III much smaller hyaline empty ; IV flowering 

 often very narrow or reduced to the geniculate awn, St. 3, 

 styles distinct. 



f . Spikes solitary. Peduncle enclosed in a spathi- 

 f orm sheath. Internodes and pedicels villous. 

 Annual tufted slender 12-18". Ped. 

 Bpikelet smaller than the sessile one 1. exUis, Hochst. 



Perennial, branched upwards, l-3ffc., spike 



1-2'. Sessile spikelet 

 the pedicelled . 



smaller than 



II 



III 



IV, 



2. fastigiatvs, 8w. 



3. fovenlatus, Dei. 



4. apricus, Trin. 



tensely tufted, 1-2 ft. Spike 1-1£". 

 Spikelets H' sub -equal . 

 , Spikes digitately 2-nate. Common pedunole 

 with a spathiform sheath .... 



Spikes sub-digitately fascicled. Pedicels and 

 internodes compressed with translucent 

 centre. Tufted rarely 1 ft. Spikes 1-2'' . 5. pertutus, Willd. 



Spikes racemed or panicled. 



a. Pedicels and internodes of spikes compressed 

 with thickened margins and translucent 

 centre. 



1. Spikes with more than 5 prs. of spkts. 



Joints cup-shaped. Base of panicle 



branches ciliate and bulbous . . .6. intermedins, Br. 



2. Spikes with fewer than 5 prs. of spkts. 



.Joints truncate, base of paniole — 

 branches ciliate, not bilb us. 

 Herbaceous, not fastigiata, L.linear . 7. micranthus. Kunth. 



Suffruticoae, fastigiately-branched. T. 

 linear-laueeolate 8. assimilis, Steud 



b Pedicels and internodes of spikes terete, 



Panicle 1-2''. Branches subsolitary, spikes 



£-f 7 with spkts. almost to their base . 9. foscwularis, Roxb. 



576 



