432 CXLII. GRAMINEiE. 



Articulation of spikelet generally ob- 



liiiue 25. ANDEoroGON. 



Fertile s]nlielets ovate, rounded on the 

 back, in a decompound panicle with 

 unjointed branches. Articulation of 

 spikelets transverse. Lowest glume 

 thickened, inconspicuously nerved in 



the middle 26, Soeghum. 



*** Spikelets in threes, central sessile hermaphro- 

 dite, two lateral pedicellate, male, terminating 

 the branches of an open panicle .... 27. Chbysopogon, 

 Spikelets fascicled, 4 or 6 neuter or male, 



spikelets surrounding the solitary fertile one 28. Antiiistikia. 



Subtribe 4. Matade^. 



Male spikelets numerous towards the top, fe- 

 male spikelet solitary at the base of the un- 

 jointed fascicled spikes 29. Coix. 



Teibe 2. Fhalarideae. 



Flowering glume awnless, with 2 rudimentary 

 glumes between it and the 2 outer empty 



glumes. Stamens 3 30. Phalaeis. 



(Hierochloe and Holciis will be found in Avenacece.) 



Teibe 3. Foacese. 

 Subtribe 1. Ageostide^. 



a. None of the glumes awned or pointed or mu- 

 cronate. 

 Flowering glume sessile, naked at base, gene- 

 rally 1-nerved. Grain loose in pericarp . 31. Spoeobolus. 

 )8. Outer glumes either awned or pointed or mu- 

 cronate. 

 Outer glumes nearly equal, acute, not much 

 longer than the flowering 3-5-nerved 

 gliune, which in all the Cape species is 

 awned on back. — Callus with a short beard 

 or naked. Terminal rudimentary glume 



often visible ■ . 32. Ageostis. 



Outer glumes long awned, longer than the 

 awned flowering glume. Callus not 



bearded 33. Poltpogox. 



Callus bearded with hairs, which are as long 



as flowering glume 34. Calamageostis. 



Subtribe 2. Stipace^. 



Awn simple, scarcely twisted, between the lobea 



of the 2-fid, silky, flowering glume . . . .35. Lasiageostis. 



Awn simple, much twisted, terminal at the undi- 

 vided point of the coriaceous flowering glume . 36. Stipa. 



Awn 3-ficl between the lobes of the 2-fid or emar- 

 ginate flowering glume 37. Stipageostis. 



Awn 3-fid, terminal at the undivided point of the 



flowering glume 38. Aeistida. 



Subtribe 3. Oetze^. 



Outer glumes obsolete. Flowering glume and 



palea rigid, herbaceous 39. Leeesia. 



