GRAMINEZ (Stapf). 318 
ubtribe 4. EuanpRopocone£,—Rhachis as in Saccharex and Ischemee. 
Racemes variously arranged. Lower eres of all spikelets empty ; upper floret 
usually awned. 
EX. Bhi s.— Rha he pe a gee fragile. One spikelet of 
each pair sessile, the other pei cage 
X. Andropogon.—Racemes solitar ry, ‘ait a rg r panicled; rhachis fragile 
pegon.— $ e, di 
The sessile spikelet Saal the edieelted if present awnless or awned, but 
not from the upper valve. No whorl of gd spikelets at the base of the a 
or where an ayia se one occurs the racemes are always paired, and each pair 
= pede Phe e. 
Anthist aitsconcs short, La imnson in esate —- fascicles each 
wit th reece of 40 red o e, and supported by 
a proper spathe, 
Tribe 2. PANICEZ. Spikelets in usually sugges aS racemes or panicles. 
Glumes herbaceous or membranous , the lower smaller, very small or r suppressed, 
Lower valve generally t An they phor Vy pe Bray in structure and 
nervation, the upper firmer, at length rigid, are chartaceous to ple 
awnless, very rare] y mucronate. 
* Glumes and lower valve e entire, awnless or caudate- or Places aristate, 
Fruiting valve subchartaceous to crustaceou 
t Mature spikelets falling entire and singly from the tips of their pedicels. 
XII. Cee ace —Spikelets awnless. I 0. Lower valve quite 
empty ; s 5 or fewer, pin igh curved, usually submarginal. 
XO Digiteria,— —Spikelets small, awnless. Lower glume minute, 
arely Q. 
Lower valve generally with a Heche pale; nerves 5-7, close, pete hy 
gee “oa 
XIV. P cum.— Spikelets awnless, or the glumes sate hg lower valve caudate- 
mu etic or caudate-aristate, Lower glume dis Lower valve with a 
2-nerved or a te line rudimentary pale or ary Cae 3 sisal different 
Ti 
XV. Oplismenus thik lets fascicled or solitary on a simple axis, or on th 
branches of a panicle. Glumes and lower valve, or at least the lower glume 
snbulate- ~aristate. 
XVI Axonopus.— Spikelets of shoe Pe oad glume fimbriate. Lower valve 
with a deeply cleft short pale and ag fl 
XVIL Setaria.— Spikelets of Casta ‘ek eaklniided by bristles. 
tt Mature spikelets not falling singly, or not from the tips of their pedicels. 
XVIII. isetum i corn a singly or in small clusters by an 
iavalnre( (formed by naked o se bristles) and falling with it. 
XIX, Stenotaphram.— Spikelets s sbpersatent on the flat indistinctly and tardily 
disarticulating rhachis ed a false spik 
XX. An €phora.—Spik in pmirentcn spicate clusters with a false involucre, 
formed from the Nand er ved hard glume of each spikelet. 
96 hae and lower valve 2-lobed or emarginate, 1 vith a fine awn or mucro 
from the sinus, rarely all muticous. Fruiting awe rigidly membranous. 
I. Tricholena. —Upper glume and lower valve 5-nerved; nerves usually very 
wba hidden by copious and long silky hairs, and anastomosing below the 
obtuse tips, 
1. Melinis.—Upper glume 7-, lower valve 5-nerved; nerves straight, con- 
§picuous, not anastomosing below the acute tips. 
