Part 2, 1912] POACEAE 
Palet free at the apex, the summit of the fruiting 
scale hyaline, and separated from the palet. 
Palet enclosed at the apex. 
Fruiting scale boat-shaped, its margins narrow; 
internerves of the outer scales deeply folded and 
clothed with long hairs. 
Fruiting scale convex, with the margins broadly 
hyaline. 
Inflorescence of slender 1-sided racemes. 
Spikelets long-silky, the fruiting scale lanceo- 
late-acuminate. 
Spikelets shortly pubescent or glabrous, the 
fruiting scale elliptic. 
Inflorescence a capillary panicle. 
Fruiting scale rigid, indurated (or if thin the margins not 
hyaline), the margins often inrolled. 
Spikelets strongly tuberculate-hispid when mature, later- 
ally compressed. 
Spikelets otherwise. 
Alternate spikelets facing in opposite ways. 
Alternate spikelets not facing in opposite ways. 
Spikelets with the back of the fruiting scale turned 
away from the rachisof the spike-like racemes. 
Spikelets without a basal callus. 
Spikelets swollen on the inner side and fitting 
into alternate excavations, the first scale as 
long as the spikelet or nearly sO. 
Spikelets otherwise, the first scale not more 
than one fourth as long as the spikelet. 
Spikelets of 4 scales; racemes racemosely 
arranged. 
Spikelets of 3 scales, the first wanting; 
arrangement of racemes otherwise, 
or rarely racemose. 
Racemes naked, the spikelets super- 
ficial. 
Racemes tuberculate- hispid, the spike- 
lets often immersed in the rachis. 
Spikelets with a ring-like basal callus formed of 
the first scale and rachilla-internode. 
Spikelets with the back of the fruiting scale turned 
toward the rachis of the spike-like racemes, 
or spikelets long-pedicellate and paniculate. 
Spikelets of 3 scales, plano-convex, in spike- 
like racemes. 
Spikelets of 4 scales, usually bi-convex, com- 
monly in panicles. 
Spikelets in spike-like racemes, obtuse. 
Spikelets in panicles, bi-convex, or if plano- 
convex and in racemes, then acute. 
Second and third scales not indurated, like 
the first in texture. 
Outer scales unequal, not entirely en- 
closing the spikelet. 
Fruiting scale indurated, enclosing 
the palet. 
Second scale not saccate at the 
base. 
Stems herbaceous, not woody 
nor bamboo-like. 
Fruiting scale without ap- 
pendages, its inrolled 
pela clasping the 
ale 
Palet of the third scale 
not enlarged. 
Palet of third scale en- 
larged, forcing the 
spikelet open. 
Fruiting scale with lateral 
basal appendages or 
excavations, its mar- 
gins commonly not 
inrolled. 
Stems usually woody, bamboo- 
like; spikelets with the 
outer scales papery. 
Second scale large, saccate at the 
base, many-nerved. 
41. 
145 
LEPTOCORYPHIUM. 
42. ANTHAENANTIA. 
43. VALOTA. 
44. SYNTHERISMA. 
45. 
LEPTOLOMA. 
47. ECHINOLAENA. 
46. 
THRASYA, 
48. MESOSETUM. 
50. 
55. 
BRACHIARIA, 
. ANASTROPHUS. 
. AXONOPUS. 
. HRIOCHLOA, 
. PASPALUM. 
. PASPALUM. 
PANICUM. 
. STEINCHISMA. 
. ICHNANTHUS. 
; LASIAcIs. 
. SACCIOLEPIS. 
