A FLORA OF MANILA 



5. Staminate and pistillate spikelets in the same inflorescence. 



2. Coix ty 

 4. Spikelets usually in pairs, sometimes solitary or in threes, one 

 sessile and one or two pedicellate, in the same inflorescence, the 

 sessile one perfect, the pedicelled usually male or empty. ( Tribe 

 Andropogoneae . ) 

 5. Spikelets all similar, perfect; joints of the rachis not much 

 thickened nor excavated for the reception of the spikelet. 

 6. Axis of the spikes continuous. 



7. Spikelets solitary, in several, slender, unilateral; digitately 



arranged spikes 3. Dimeria K 



7. Spikelets in pairs, the spikes forming a white, cylindric, 



spike-like panicle 4. Imperata ts 



6. Axis of the spikes jointed. 

 7. Spikes solitary, terminal. 

 8. Spikelets in pairs at each joint of the rachis. 



5. Pogonatherum 7t 

 8. Spikelets in threes at each joint of the rachis. 



6. Polytrias 74 

 7. Spikes 2 to many, digitate or crowded on the short main 

 axis. 



8. Spikelets solitary 7. Arthraxon 7<> 



8. Spikelets in pairs, one sessile and one pedicelled. 



9. Spikelets 1-, rarely 2-flowered, when 2-flowered the 



first empty glume with a median furrow.. 8. PolKnia 77 

 9. Spikelets 2-flowered, the first empty glume not 



furrowed '. 14. lachaemum $0 



7. Spikes in a much-branched panicle upon an elongated main 



axis 9. Saccharum 77 



5. Spikelets dissimilar, the joints of the spike cylindric, more or 

 less hollowed out for the reception of the- spikelets. 

 6. Spikelets in pairs. 

 7. First empty glume flat; very coarse grasses.. 10. Rottboellia 7i 

 7. First empty glume globose; a slender, much-branched 



grass „ 11. Manisuris 7« 



6. Spikelets solitary...; 12. Ophiurus 77 



5, Spikelets dissimilar; joints of the spikes not thickened nor 

 excavated. 

 6. Sessile spikelets 2-flowered. 



7. Spikes reduced to a terminal joint, with 3 spikelets, more 



or less enclosed by a sheathing leaf '. 13, Apluda 7j 



7. Spikes with many 'joints, digitate or in pairs; spikelets 



awned .■. 14. Ischaemum so 



6. Sessile spikelets 1-flowered; grasses of various habit with 

 awned or unawned spikelets. 

 7. Fertile spikelets surrounded by a whorl of sterile or male 



ones 15. Themeda ti 



T. Fertile spikelets not surrounded by a • whorl of sterile or 



male ones , 16. Andropogon tl 



. Flowering' glumes similar in texture to the empty ones, never hyaline 

 or thin; inflorescence spicate, solitary, the spikelets falling singly 

 or in groups. 



