44 



SOUTH INDIAN GRASSES 



B. Rachis of inflorescence usually 

 jointed. 



Spikelets usually binate ( j-nate at 

 the top), pairs of spikelets alike 

 or dissimilar; empty glumes 

 larger and the flowering glumes 

 smaller, hyaline, the fourth glume 

 awned or reduced to an awn 



Scries II. — Poaceaa. 



A. Rachilla produced or not beyond the 



flowering glume. 



Spikelets I -flowered, with three 

 glumes ; first and second empty, 

 third flowering and awned ; 

 rachilla jointed 



Spikelets I- or more-flowered, 

 bi-seriate and secund on an in- 

 articulate spike or on the spi- 

 ciform branches of a slender 

 panicle; flowers all or the 

 lower only bi-sexual 



B. Rachilla produced beyond the upper- 



most flowering glume and articulate. 

 Spikelets 2- or more-flowered, pedi- 

 celled, rarely sessile, in effuse, 

 contracted or rarely spiciform 

 panicles 



Spikelets I- or more-flowered, 

 sessile, I- to 2- or more-seriate on 

 the rachis of a simple spike, or 

 partially sunk in cavities of the 

 same. Glumes awned or not, 

 first and second glumes are 

 opposite or subcollateral, persist- 

 ent or separately deciduous ; 

 first glume minute or absent 



IV. Andropogonese. 



V. Agrostideae. 



VI. Chlorideae. 



VII. Festucaceae. 



VIII. Hordeae. 



