97. GKAMIJTEiE. 
3S5 
19. Calamagrostis. Pan. diffuse. Gl. nearly equal ; lower 
rather the longer. Fl. 1, with silky hairs at its base, with 
or without a superior radiment. Lower pale awned. 
20. Apeba. Pan. loose. Gl. memhranous, acute, unarmed ;' 
loicer the smaller. Fl. 1, with hairs at its base, and a pe- 
dicel-like rudiment. Pales unequal, scarious ; lower with 
a long subtemiinal awn. 
21. Agrostis. Pan. loose. Gl. membranous, acute, un- 
anned ; upper smaller. Fl. 1, with hairs at its base ; no 
rudiment. Pales unequal, scarious ; dorsal awn falling short 
of the glimies, or 0.—^. canina wants the inner pale. 
[22. Lagxtrits. Pan. sjiikelike. Gl. scarious, ending in a 
long fringed bristh. 11. 1, with a pedimcle-like rudiment. 
Lower pale ending in 2 long bristles and with a dorsal kneed 
twisted awn.] 
23. PoLYPOGON. Pan. close, spikelike. Gl. scarious, each 
tcith a Img bristle from just below the notched tip. Fl. 1. 
Lower pale usually awned fi-om just below the tip. 
24. Gastridium. 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 VjENEJS. Spikelets with 2 or more flowers ; upper 
often barren. Gl. equalling or overtopping the flowers. 
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. CoRYNEPHORUS. Fl. 2, perfect, awned. Awn straight, 
t'ointed in the middle ; the upper ]jortion clavate; a tuft of 
laii's at the joining. Tip of lower pale entire. 
27. AiRA. Pan. lax. Fl. 2, with or without the rudiment of 
a third (sometimes perfected in^. ccespitosa). 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. Trisetum. 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 nor furrowed. 
29. AvENA. Fl. 2 or more. Lower pale with lateral veins, 
awned, ending in 2 points. Avra dorsal, kneed and 
8 
