106 
[Sorghum. 
CLV1I. GR AMINES (Stapf). 
7 Primary branches of panicle divided, racemes ter- 
minal and lateral ; sheath-nodes appressedly 
and finely pubescent, not bearded (nos. 1-24). 
Mature sessile spikelets deciduous with the adjoin- 
ing joint of the rhachis and its pedicelled com- 
panion : spontaneous grasses (nos. 1-10). 
Panicles very narrow and long ; branches erect 
or suberect, the lowest often up to % ft. 
long ; sessile spikelets narrowly lanceolate, 
acute, 3^ lin. by 1-1| lin., greenish in the 
upper half or third, finely awned ; leaf- 
blades usually not over \ in. wide ; stems 
slender ... ... ... ... ... 1 
Panicles usually wide and loose, pyramidal when 
fully expanded, or obovate-lanceolate and 
more or less contracted, rarely narrow, 
lineal-oblong (see 7, 8. Elliotii and 9, 8. 
cethiopicum) ; stem mostly stout. 
Sessile spikelets lanceolate, acutely acuminate, 
3-4 lin. by 1—1 j lin., loosely villous on the 
back (young), often brilliantly red and 
with yellowish tips when mature, awned, 
awn 4-8 lin. long ; pedicelled spikelets 
deciduous from the discoid tips ; panicle 
pyramidal, branches and branchlets 
scabrid ; leaf-blades f- 1 in. wide ... 2 
Sessile spikelets oblong- to elliptic- or ovate- 
lanceolate or ovate. 
Sessile spikelets over 2 lin. long ; branches 
and branchlets more or less rough 
(often spinulously scabrid). 
• Panicles more or less pyramidal, very 
large ; sessile spikelets not white- 
silky. 
Leaf-blades up to about \ in. wide, the 
lower long-attenuated towards the 
base ; longest branches of panicle 
rarely up to \ ft. long ; sessile 
spikelets oblong to elliptic-oblong, 
subacute, 3 lin. by 1J lin., hairs 
white, scanty, awns 6-7 lin. long ; 
pedicelled spikelets lanceolate, 3 
lin. long, persistent 3 
Leaf-blades often over | in. (up to 2 in.) 
wide, rather broad and often 
rounded at the base ; longest 
branches of panicle often over % 
(to up to 1) ft. long ; sessile spike- 
lets acutely acuminate ; pedicelled 
spikelets deciduous. 
Sessile spikelets rather long-acumi- 
nate, 3-4§ lin. long, hairs usually 
fulvous to rufous. 
Sessile spikelets oblong, 3-3^ lin. 
by 1-1 £ lin., awnless or awned 4 
Sessile spikelets oblong-lanceolate, 
4-4| lin. by 1 J~l£ lin., awn 6- 
8 lin. long ... ... ... 5 
. 8. virgatum. 
. S. lanceolatum. 
. S. sudanense. 
. S. arundinaceum. 
. S. vogelianum. 
