CLVII. GRAMINEiE (Stapf). 
13 
Inflorescences usually different (see however Axono- 
pus and Paspalum sp.) ; fruiting valve with 
more or less inrolled margins, usually crusta- 
ceous and straw-coloured or whitish ; valvule of 
the barren floret, if developed, not attached to 
the false fruit. 
Spikelets falling entire and singly from the per- 
sistent pedicels, rarely deciduous with the 
joints of a tardily disarticulating rhachis 
(Stenotaphrum). 
Spikelets not awned, or if awned, then subsessile 
in false secund variously arranged spikes 
and with the awns from the entire tips of 
the upper glume and lower valve (E chino - 
chloa sp. ) or from the tips of both glumes or 
at least the lower ( Oplismenus ) ; fruiting 
valve mostly crustaceous, rarely charta- 
ceous b. Panicastrae. 
Spikelets finely awned or mucronate from the 
notched tips of the upper glume and barren 
valve (or if muticous, these at least slightly 
notched), delicately pedicelled, panicled ; 
lower glume very minute ; fruiting valve 
rigidly membranous. . . 
Spikelets falling in groups, or if singly then sur- 
rounded by an involucre of bristles or at least 
supported by 1 to several bristles. 
Spikelets falling surrounded by an involucre of 
bristles or spines or bract-like scales, or at 
least supported by 1 to several bristles ; or 
with the lower glumes of each group form- 
ing a false involucre 
Spikelets falling in clusters (modified spikes) 
together with the flat subfoliaceous rhachis 
or its joints ; upper spikelets of each cluster 
imperfect 
Both florets fertile, or if the lower £ , then its valve 
more or less resembling that of the upper floret and 
indurated : — Sub-tribe Isachnince 
c. Meliniastrse. 
d. Cenchastrse. 
e. Trachydastrae. 
/. Isachnastrse. 
a. Digitariastrae. 
Spikelets quite awnless ; lower glume minute, rarely 0 
or larger and then delicately hyaline ; valve of 
lower floret usually with 5-7 close, straight, pro- 
minent nerves 52. Digit aria, y ~ 
Spikelets slender- awned. 
Awns long, fine from the upper glume or barren 
valve. 
Awn from the barren valve ; lower glume 0, upper 
reduced to a minute scale 53. Chloridion. 
Awns from the upper glume and barren valve, 
tangled ; lower glume well developed . . . 54. AcRiTOCHiETE. 
Awns from the fertile valve, often short. 
Spikelets 2 -flowered, dorsally not compressed ; 
lower valve more or less indurated and like 
the fertile 55. Alloteropsis. 
Spikelets 1 -flowered, dorsally much compressed ; 
lower valve like the glumes very thin ... 56. Coridochloa. 
