98. GRAMINE^. 
479 
23. PoLYPOGON. Pan. close, spikelike. Gl. scarious, each 
with a long bristle from just below the notched tip. Fl. 1. 
Lower pale usually awned from just below the tip. 
24. Gasteidium. Pan. close, spikelike. Gl. membranous, 
acute, awnless, ventricose at the base, much exceeding the 
flower. Fl. 1. Lower pale truncate or toothed at the 
end, with or without a dorsal awn. 
Tr. X. A VENE^E. Spikelets with 2 or more flowers ; upper 
often barren. Gl. equalling or overtopping the Jlovers. 
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. Pales 
hardening on the fruit ; tip of lower entire. 
26. CoEYNEPHOKUS. Fl. 2, perfect, awned. Awn straight, 
jointed in the middle ; the upper pwtion clavate ; a tuft of 
hairs at the jointing. Tip of lower pale entire. 
27. AiRA. Pan. lax. Fl. 2, with or without the rudiment 
■ of a third (sometimes perfected). Lower pale denticulate 
' or bifid at the tip, terete on the back. Awn dorsal, kneed, 
(in A. ccespitosa straight). Ovary glabrous. Fr. not crested. 
28. Teisetum. Spikelets crowded. Fl. 2—6. Lower pale 
with faint lateral veins, ending in 2 acute teeth, awned. 
Awn dorsal, kneed and twisted. Ovary glabrous. Fr. 
neither crested noi' fiirrmred. 
29. A"\rENA. Fl. 2 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. Aerhenatheeum. Fl. 2, with a rudiment ; loicer fl. 
male with a long kneed and twisted awn from below its 
middle ; upper with a short straight awn from near the 
tip. Pales herbaceous, ending in 2 points. Ovary hairy 
at the top. Fr. oblong, terete, downy, not furrowed. 
Tr. XL FESTUCE.E. Spikelets with 2 or more flowers, 
upper often barren. Gl. falling short of the lowest Jtoiver. 
Style short or 0. 
t Lower pale loith nearly parallel veins which do not join to 
form an aivn. Awn 0. Styles terminal. _ 
+ Lower pale 2 — 3-fid. 
31. SiEGLiNGiA. Fl. 2 — 4. Lower pale rather coriaceous, 
rounded on the back, bifid with an intermediate broad 
point. Nut free. 
