186 CLVII. GRAMINEiE (Stapf). 
Racemes subsessile in the spathe, slender ; 
hairs rather long and somewhat loose 
Racemes on elongated peduncles almost as 
long as to longer than the spathe. 
Racemes very slender ; joints and pedi- 
cels almost glabrous ; lower glume 
of sessile spikelets hairy all over 
when young, then glabrescent ex- 
cept along the sides 
Racemes stouter ; joints, pedicels and 
lower glume of sessile spikelets hairy 
on the back. 
Peduncles not or very slightly exceed- 
ing the spathe ; racemes inter- 
ruptedly and densely silvery vil- 
lous ; joints clavate, 2 lin. long 
Peduncles at length much exceeding 
the spathe ; racemes greyish- 
pubescent, joints subcylindric, 3 
lin. long (perennial ?) 
Perennial ; lower glume of sessile spikelets much 
rounded on the back, subcoriaceous, glabrous, 
very obscurely nerved, 3-3 ^ lin. long 
Fertile valve of sessile spikele'ts shortly 2 -fid, 2 -toothed 
or entire, rarely divided to the middle ( 10, S. ur sti- 
lus), their lower glume thinly chartaceous, usually 
almost flat on the back, very finely but distinctly 
nerved; perennial, rarely annual (15, S. scintillans) 
or suffrutescent (17, S. Kelleri). 
Culms simple and usually few-noded below the flower- 
ing branches, never suffrutescent. 
Joints and pedicels filiform, thickened upwards, 
like the sessile spikelets densely hairy all over. 
Leaves more or less hirsute (usually densely so) ; 
blades without spinelets ; sessile spikelets 
3^ lin. long, their fertile valve 2-fid to one 
half of its length ... 
Leaves quite glabrous ; blades scabrid from 
distant spinelets ; sessile spikelets 4-4| lin. 
long, their fertile valve 2 -fid to one quarter 
of its length 
Joints and pedicels linear to clavate, like the 
spikelets glabrous or variously hairy, but 
never densely so all over. 
Sessile spikelets close, almost imbricate, twice 
as long as the joints ; racemes practically 
glabrous except the shortly bearded callus ; 
column of awn long-exserted 
Sessile spikelets more distant, about as long as 
or only slightly longer than the joints ; 
racemes distinctly hairy. 
Flowering branches distant, very long and 
slender ; racemes not plumose, the 
longest cilia of the joints and pedicels 
not exceeding 2 lin. 
Perennial ; fertile valve of the sessile spike - 
let shortly 2-fid or 2-dentate. 
[Schizachyrium. 
5. 8. exile. 
6. S. glabrescens. 
7. 8. nodulosum. 
8. S. griseum. 
9. 8. semiberbe. 
10. S. ursulus. 
11. 8. Jeffreysii. 
12. 8. Schiveinfurthii. 
