318 
Tribe VIII. AGROSTIDE.®. 
1. Flowering glume awnless. 
2. Panicles strict ; pericarp free : grain not perma- 
nently enclosed in the flowering glume and palea.. (45) Sporobolus 
2. Panicles very lax ; pericarp adherent ; grain enclosed 
in the flowering glume and palea ( 48 ) AyrosUs 
1. Flowering glume awned. 
2. Flowering glume indurated, much firmer in texture 
than the empty glumes, 3-awned (44) Aristkla 
2. Flowering glume usually hyaline and more delicate 
than the empty glumes, 1-awned. 
3. Flowering glume awned from the apex or 
from the cleft ; spikelets articulate on their 
pedicels. 
4. Spikelets geminate, lanceolate or 
linear-lanceolate ; first and second 
glumes 3-nerved ; flowering glume 
faintly 1 to 3 nerved, awned from 
the apex (46) Garnotia 
4. Spikelets solitary ; first and second 
glumes nerveless ; flowering glume 
lobed at the apex and bearing a 
long awn in the cleft (47) GarnotieUa 
3. Flowering glume awned from the back near 
the base ; spikelets inarticulate ; rhachilla 
produced and penicellate - (49) CaUimaijrostis 
Tribe IX. AVENE-ffi. 
1. Spikelets small, 2-flowered ; rhachilla not produced. 
2. Flowering glumes long ciliate-fringed on the back 
or margins ; emtpy glumes broad, many nerved ; 
spikelets awned (50) Eriachne 
2. Flowering glumes naked: spikelets unowned (51) Coelachne 
1. Spikelets large, 2 or more flowered, rhachilla produced 
beyond the upper flower - (52) Avena 
Tribe X. CHLORIDEiE. 
1. Spikes or spiciform branches digitate or approximate. 
2. Spikelets 1-flowered, the upper imperfect flower 
wanting - (53) Cynodon 
2. Spikelets two or more flowered, the upper flower 
imperfect, the flowering glume awned (54) Chloris 
2. Spikelets with three to six perfect flowers. 
3. Spikes with terminal spikelets (55) Eleiisine 
3. Spikes with the rhachis extending beyond the 
spikelets in a manifest point - (,56) Dactyloctenhwi 
1. Spikes or spiciform branches panicled, filiform ; spikelets 
minute, alternate (57) Leptochloa 
Tribe XI. FESTUCEiE. 
1. Spikelets in spiciform branches of a simple panicle. 
2. Flowering glumes 1 to 3-nerved ; spikelets many 
flowered (60) Diplachne 
2. Flowering glumes 7 to 9-nerved ; spikelets 1 to sev- 
eral flowered. 
3. Spikelets l-flowered ; upper glumes con- 
volute, with setiform tips (6S) Lophather urn 
3. Spikelets more than 1-flowered ; fruiting 
glumes with reflexed submarginal bristles.. (62) Centotheca 
