104 
CLVII. GRAMINEiE (Stapf). 
\Homozeugos 
villous all over, the hairs 1-2 lin. long, nerves 7-9, well marked 
within, greenish, with transverse veins ; upper linear, narrow, 
obtuse, 3-nerved, loosely hairy above the middle, ciliolate along the 
margins. Lower floret reduced to a linear- oblong subacute hyaline 
pubescent densely ciliolate 2-nerved valve, over 2 lin. long. Upper 
floret J : valve narrowly linear-lanceolate, about 2-| lin. long, cilio- 
late, at least upwards, with 2 linear-subulate erect ciliolate lobes, 
up to f lin. long ; awn slender, 1J in. long, kneed at the middle, 
column with 5-6 spirals below it, loosely hairy, bristle glabrous, 
scaberulous ; valvule as long as the lodicules, with a tuft of cilia 
from the top. 
Lower Guinea. Angola : Benguella ; country of the Ganguellas and 
Ambuellas, Gossweiler, 2586 ! 
28. SORGHUM, Pers. Syn. i. 101. 
Spikelets 2-nate, those of each pair differing in shape and sex, one 
sessile, the other pedicelled or represented by a pedicel only, on the 
articulate fragile or (in cultivated forms) tough rhachis of panicled 
few- (sometimes 1- or, the other extreme, 6-8-) jointed racemes, the 
sessile spikelet falling with the contiguous joint and the accom- 
panying pedicelled spikelet or at least its pedicel. Florets 2, lower 
reduced to an empty valve, upper $ in the sessile, $ or neuter in 
the pedicelled spikelets, if present at all. Sessile spikelets dorsally 
compressed. Glumes equal, coriaceous, at least when mature, 
rarely permanently chartaceous, muticous, upper with a broad 
flattened or convex back with the margins narrowly inflexed near 
the tips and otherwise involute, upper boat-shaped, keeled upwards 
with narrow hyaline, usually upwards ciliolate margins. Valves 
hyaline, ciliate, of lower floret 2-nerved or nerveless, of upper oblong 
to ovate, 2-dentate or 2-lobed with the lobes free or more or less 
adnate to a perfect or variously reduced awn or a mucro rising from 
the sinus,, rarely entire and mucronate or muticous, 1- or 3-nerved. 
Lodicules 2, ciliate or glabrous. Valvule hyaline, often minute or 
0. Stamens 3. Stigmas laterally exserted ; styles terminal or sub- 
terminal. Grain in the spontaneous species mostly obovoid, dorsally 
compressed, in cultivated forms frequently enlarged, globose or sub- 
globose ; embryo as long as or slightly longer than half the grain. 
Pedicelled spikelets, if present, much narrower than the sessile, 
lanceolate to subulate, $ or neuter, sometimes reduced to the glumes 
or one glume only or quite suppressed. Glumes permanently 
herbaceous, like the hyaline 2-1-nerved ciliate valves awnless. — 
Annual or perennial, often robust, grasses. Leaf-blades convolute 
in bud, usually flat, herbaceous, often large. Panicles erect or 
nodding with verticillate or scattered branches, often large, in the 
spontaneous species mostly loose, in the cultivated forms frequently 
variously contracted to compact. 
