97. (JBAMINE^. 397 



Tr. X, A VENEAi. Spikelets witli 3 or more flowers ; upper 

 often barren. Gl. eqaaUing or overtopping thejlowers. Lower 

 pale awned. Style short or 0, 



25. HoLCus. Fl. 2 ; lower perfect, awnless (or very rarely 

 awned) ; upper usually male, with a dorsal awn. Paks 

 hardening on the fruit ; tip of lower entire. 



26. CoEYNEPHORus. Fl. 2, perfect, awned. Awn straight, 

 jointed in the middle; the upper portion clavate; a tuft of 

 hairs at the joining. Tip of lower pale entire. 



27. AiBA. Pan. lax. Fl. 2, with or without the rudiment 

 of a third (sometimes perfected in A. ccespitosd). Lower 

 pale denticulate or bitici at the tip, terfete on the back. Awn 

 dorsal, kneed (in A. ccespitosa straight). Ovary glabrous. 

 Fr. not crested. 



28. Teisbtum. Spikelets crowded, Fl. 2—^, Lower pale 

 with faint lateral veins, ending in 2 acute teeth, a,wned. 

 Awn dorsal, kneed and twisted, , Ovary glabrous. Fr. 

 neither crested nor furrowed. 



29. AvDNA. Fl. 3 or more. Lower pale with lateral veins, 

 awned, ending in 2 points. Awn dorsal, kneed and twisted. 

 Ovary hairy at the top. Fr. crested and furrowed. 



30. Ahbhbnathbbum. Fl. 2, with a rudiment ; lower fl. 

 mafewithalong kneed and twisted awn from below its 

 middle ; upper with a short straight awn from near the 

 tip. Pales herbaceous, ending in 2 points. Ov^ry hairy 

 at the top. Fr. oblong, terete, downy, not furrowed. 



Tr. XL FESTTJCEM. Spikelets with 2 or more floweirs, upper 

 often barren. Gl. falling short of the lowest flower. Styles 

 short, 6r0.~ 



t Loiaer pale with nearh/ parallel veins which do not join to form 

 an awn. Awn 0, iS^yles terminal. 



4. Lower pale 2 — 3-fld, 



31. Tbiodia. Fl, 2 — 4. Lower pale rather Coriaceous, 

 rounded on the back, bifid wif^h an mljermediate broad point. 

 Nutfree., ' , ■ 



14 Lower pale nearly or quite entire. 



32. KcELBBiA. Gl. unequal ; upper 2 — 3-ribbed, Spikelet 

 compreasedj 2 — 5-flowered. Lower pale keeled, acuminate, 

 or with a straight subterminal brisile. Nut free. 



