ol 
or 
for) 
=J 
Md 
ie *) 
52 
. Glumes three (only one in Coleanthus, or occasionally four in 
some species of Sporobolus and Muhlenbergia), the first two 
empty; palea 2-nerved or nerveless, very rarely 1- nerved 
(Cinna) or wholly wanting (Alopecurus and some species of 
Agrostis) _.....--.-= Tribe VIII. AcrostipE®. (See page 57) 
Culms herbaceous, annual; leaf blade continuous with its 
shea 
. Culms woody, perennial; leaf blade articulated with its 
sheath Bd bg! ibe X 
XIII. Bamsusex. (See page —) 
. Spikelets pedicellate, in SINE spike-like panicles, or = 
mes, these never unilatera 
¢ 
; Spikelets sessile, i in true Eris or on Very short pedicels in 
. Empty glumes generally longer than the first flowering glume; 
one or more of the flowering glumes awned on the back or 
m between the teeth of the bifid apex (some cultivated 
ee Say ; awn twisted, usually geni smtnen very 
rarely straight....-.-...- Trise IX. AVENEX. (See page 87) 
. Empty glumes generally shorter than the floral ame > ait er- 
ing glume awnless or with from one to many a (very 
rarely dorsal) straight or simply divergent aw 
Tribe XI. Fesrucez. ncn page 112) 
Spikelets in unilateral spikes or racemes, these racemed, digitate 
or fasciculat Tribe X. CHLORIDE®. (See page 97) 
. Spikelets inserted on the alternate teeth or ile ot of the 
rachis 
s forming equilateral, flattened, or cylindrical terminal 
Tribe XII. Horpem. (See page 157) 
