CL VII. GRAMINEiE (Stapf). 
15 
Lower glume developed. _ 
Rhachis flat, more or less corky, disarticu- 
lating tardily at maturity ; spikelets 
sunk in the cavities of the rhachis and 
falling with the joints 65. Stenotaphrum. 
Rhachis persisting, not articulate ; spikelets 
falling from the pedicels. 
Glumes neither awned nor caudate ; if 
shortly cuspidate-acuminate, then the 
fruiting valve obtuse with an imposed 
mucro and the margins inrolled all 
along. 
Fruiting valve acute, not mucronate ; 
spikelets solitary, closely 2 -seriate, 
contiguous with their sides ; false 
spikes rigid, not several times longer 
than the internodes of the long com- 
mon axis, their lower parts more or 
less appressed to the alternately 
hollowed-out flanges of the latter ... 66. Paspalidium. 
Fruiting valve obtuse, abruptly mucro- 
nate or aristulate ; spikelets solitary 
or paired, when solitary contiguous 
with their backs ; false spikes often 
flexuous or curved, usually several 
times longer than the internodes of 
the relatively short- common axis, 
spreading from the base 67. Urochloa. 
Glumes caudate or cuspidate-acuminate or 
awned. 
Glumes awned from the entire acute or 
acuminate tip, or caudate or cuspi- 
date-acuminate ; margins of the 
fruiting valve flat upwards, not em- 
bracing the tip of the valvule ; race- 
mes dense, more or less secund, often 
very numerous 68. Echinochloa. 
Glumes awned from the slightly notched 
tips ; racemes elongated or short to 
very short, secund, compact, spread- 
ing from the common axis ... ' ... 69. Oplismenus. 
Inflorescence an open panicle, rarely contracted, cylin- 
drical and spike-like ( Sacciolepis , Setaria sp.). 
Spikelets not supported by bristle-like branches. 
Spikelets not gibbous or if slightly so, then not in 
cylindrical false spikes. 
Fertile floret without any basal appendages in 
front . 70. Panicum. 
Fertile floret with basal appendages in front .. . 7f. Ichnanthus. 
Spikelets distinctly gibbous or if only slightly so, 
then in cylindrical false spikes. 
Spikelets laterally much compressed ; fruit 
equalling the spikelet, distinctly gibbous... 72. Cyrtococcum. 
Spikelets laterally not compressed ; fruit much 
shorter than the spikelet. 
Spikelets in mostly lax and open panicles, 
curved, very gibbous owing to the saccate 
upper glume 73. Rhampholepis. 
