430 CXLII. GRAMINER. 
Lowest flowering glume neuter or male. 
Flowering glume and palea (the latter 
generally flattened) hardening in fruit. 
The 2 lowest glumes generally not very 
dissimilar and almost exactly opposite. 
Inflorescence almost every form of panicle. 
(In the subgenus Digitaria the lowest 
glume is generally very small, and the 
spikelets are arranged mostly in pairs on 
one side of digitate or clustered rachis. In 
subgenus Orthopogon the 3 lowest glumes 
are generally long pointed and strongly 
MOEVOR) 1 Val al fae ecntes oy Aah es Ae 
Spikelets on very short, few-flowered ra- 
cemes, which are more or less deeply 
immersed in alternate hollows on one side 
of the thickened rachis of the solitary, 
terminal spike.—Leaves flat. Otherwise 
as in Panicum ae igs err ome 
Anomalous Genus.—Axis of the spikelet pro- 
longed into a delicate filament (rudimen- 
tary glume). All the glumes and palex 
mucronate, the flowering ones not harden- 
ing conspicuously in fruit. Both flowers 
contain scales. Palese remarkably eared on 
each side: towards the base.—Spikelets 
arranged in digitate racemes. Leaves 
generally hairy ESS once 
t+ Spikelets involucrated at their base.—The 
involucre is extremely short, little more 
than a beard in T'richolena. 
Involucre of uniform bristles, persistent, 
principally placed on one side of the 
spikelet. Flowering glume and palea 
much hardened in fruit, and the glume 
generally wrinkled on its outer surface. 
—Spikelet generally gibbous. . . . . 
Involucre persistent, of 2 forms, some of 
the bristles being feathered and some 
simply scabrous, completely surrounding 
the spikelet. 2 lowest glumes very small. 
Anthers penicillate. Grain obovate 
Involucre extremely short, beard-like, falling 
off with the spikelet, which is silkily hairy, 
terminal and solitary on a long, slen- 
der pedicel. Glumes distant and alter- 
nate, the 2 lowest extremely dissimilar. 
Flowering glumes very small. . . . . 
Involucre (falling off with solitary spikelet) 
composed of scabrous bristles, uniform 
in structure, unequal in length, 1 bristle 
extremely long.—Inflorescence densely 
spicate. Styles united at base . . . . 
Involucre embracing 2-3 spikelets, composed 
of 2 kinds of bristles, some long feathered 
. PANICUM. 
. STENOTAPHRUM. 
. BLUFFIA. 
. SETARIA. 
. PENICILLARIA, 
. TRICHOLENA. 
. GYMNOTHRIX. 
