CXLII. GIlAMINEiE. 



431 



towards the base, others merely scabrous. 



Otherwise as m preceding 10. Pennisetfm. 



Involucre beconiin^^ very hard, (composed of 

 the thickened lower glumes of the spike- 

 lets, which are united at their base,) en- 

 closing 4-6 or more spikelets placed at the 

 top of a common pedicel. Scales abseut . 11. Antuepiioiia. 



Subtribc 2. Teistegineje. 



Si)ikelets small, scattered along the branches of 



a compound panicle. Awn slender .... 12. Aeundinella. 

 Spikelets large, 1-3 together at tlie end of the 



branchlets. Awn strong, li-2 inches long . 13. Tristachya. 



Subtribe 3. Andropogineji:. 



o. Spikelets apparently l-(lowered. Lowest glume 

 absent. Barren glume with a simple not 

 twisted awn. Panicle dense, spike-like . . 14. Perotis. 



/8. Spikelets evidently 2-flowered, 3 glumes pre- 

 sent. 



* Spikelets in pairs equally fertile. 



f Grlumes all a .vnless. 



Spikelets indented in the axis of a flattened 



rachis 15- Hemarthria. 



laumo 



Panicle dense, cylindrical, lowest glumes 



thin 



16. Imperata. 



Llllll 



Panicle much divided, dense, lowest glume 



very thick 17. Eriochkysis. 



If Flowering glume with a twisted awn. 



One fertile and one neuter flower in each 

 spikelct. 

 Panicle much divided. Main rachis not 



jointed 18- EuLALiA, Trin. 



Panicle composed of 3-5 rather slender, 



spike-like branches 19- Pollinia, Tnn. 



One fertile and one male flower in each 



spikelet 20. Spodiopogon. 



** Spikelets in pairs, only one fertile. 



Pedicelled spikelet fertile, lowest one sessile, 



j^f^le . / 21. Trachypooon. 



Pedicelled spikelet, male or neuter, seldom 

 awned. 

 Fertile spikelet not awned. 



Lowest glumes of fertile spikelet empty, 



taper-pointed or 2-fid 22. Eliqnurus. 



Lowest glume of fertile spikelet male, 

 glume of one or both spikelets pro- 

 longed into a very long beak . . .23. VossiA. 

 Fertile spikelet awned, almost sessile. 

 Fertile spikelct cylindrical. Upper 

 flower female, strongly awned, pedi- 

 cellate : male flat, ^pike simple, soli- 



tj^ry 24. IlETEROPOOOIf. 



Fertile spikelets generally flattened, with 

 lowest glume prominently nerved in 

 jointed spikes or spike-like branches. 



