214 CL VII. GRAMINEiE (Stapf). 
III. PlESTIUM. 
♦Racemes 2-nate. 
Annual ; raceme-pairs in much branched spathaceous 
panicles, usually exserted laterally or subtermin- 
ally from the spathes, rather loose and delicate ; 
awn relatively long and conspicuous ; upper glume 
of sessile and lower of pedicelled spikelet with a 
bristle -like awn 5-6 lin. long 
Perennial ; raceme -pairs few with each culm, rarely in 
scanty spathaceous panicles, rather stout and dense. 
Leaf-blades broad and rounded to cordate and more 
or less amplexicaul at the base ... 
Leaf-blades narrowed or at least not widened towards 
the base. 
fLower glume of sessile spikelet deeply grooved 
between the approximate keels. 
Joints and pedicels long and densely ciliate 
(cilia 2 lin. long) ; racemes villous on both 
sides or, when seen from the back, at least 
between the rows of pedicelled spikelets, 
2-5 in. long. 
Culms wiry to almost woody below, with often 
fascicled barren branches ; racemes rather 
loose, about equally villous on both sides ; 
upper glume of sessile spikelets and both 
glumes of the pedicelled spikelets with a 
bristle-like awn (up to 5 and 3 lin. long 
respectively) 
Culms not wiry, without barren branches ; 
racemes dense, very markedly dorsi- 
ventral, villous on the back between the 
pedicelled spikelets 
Joints and pedicels shortly ciliate (uppermost 
cilia rarely over 1 lin. long), often im- 
perfectly so on the inner angle or on both, 
or almost or quite glabrous. 
Innovations and bases of the very slender 
culms coated with the firm remnants of 
old sheaths, often broken up into fibres, 
the whole of them forming hard compact 
tufts ; racemes slender, dense ; uppermost 
outer cilia of cuneate-linear joints and 
pedicels sometimes up to over 1 lin. long 
and then the racemes shortly and loosely 
villous on the back 
Innovations and bases of culms not so coated ; 
all the cilia of the j oints and pedicels short 
or scanty or 0. 
Culms not wiry, very sparingly branched 
from the upper nodes or quite simple ; 
leaf-blades very narrow, up to 1| lin. 
wide or if up to 2 lin. wide, then over 
1 ft. long. 
Sessile spikelets 3|- lin. long ; upper glume 
of sessile spikelet and usually also 
lower glume of pedicelled spikelet 
aristulate ; joints and pedicels 
slender, linear-cuneate ... ... 
[Andro'pogon. 
[mis. 
26. A. pseudcipri- 
27. A. amplectens. 
28. A. Schinzii. 
C / 
29. A. shirensis. 
A 
30. A. Dummeri. 
[Schinzii. 
3J . A. Pseudo - 
