212 
clvii. gramine^e (Stapf). [Andropogon. 
Sessile spikelets 3-4 lin. long ; cataphylls 
glabrous. 
Stoloniferous ; rhizome slender, creeping ; 
spikelets glabrous or sparingly hairy ; 
joints and pedicles shortly ciliate ; pedi- 
celled spikelets <$ 
Not stoloniferous ; rhizome short, throwing 
up dense tufts of very slender culms and 
leafy innovations ; sessile spikelets long 
villous ; j oint and pedicels long ciliate ; 
pedicelled spikelets reduced to the glumes 
Annual. 
Racemes densely whitish villous ; joints hairy 
on the back and sides 
Racemes loosely hairy on one side, very 
sparingly on the other; joints glabrous on 
the back 
ffSessile spikelets 24-3 lin. long ; lower glume wingless. 
Perennial, compactly csespitose with low culms 
and short leaf-blades 
Racemes 2-nate, densely villous ; cilia of joints 
and pedicels dense, 1 lin. long ; lower glume 
of § spikelet hairy on the back 
Racemes usually 3, digitate, not villous ; cilia 
of joints and pedicels i lin. long ; lower 
glume of $ spikelet glabrous 
4. A. prcitensis. 
5. A. pilosellus. 
6. A. cibyssinicus. 
7. A. polyatherus. 
\scharicus. 
8. A. Icilimand- 
9. A. Mannii. 
Annual, weak, with flowering branches from all 
the nodes ; racemes almost glabrous ... 10. A. humilis. 
**Pedicelled and sessile spikelets homogamous (at least 
apparently), very similar in shape and structure ex- 
cept for the awnless upper floret of the former ; com- 
pactly csespitose with short soft leaf-blades ... 11. A. homogamus. 
II. Leptopogon. 
*Culms erect, not copiously branched and suffrutescent 
below ; leaf-blades usually long. 
fRacemes 3-15 (mostly 5 or more), in corymbs or corym- 
boid panicles. 
Racemes plumose ; hairs of joints and pedicels 
silvery, as long as these to several times longer ; 
pedicelled spikelets rudimentary or 0. 
Hairs of joints and pedicels several times longer 
than these ; sessile spikelets 1-1| lin. long. [chyus. 
Sessile spikelets awnless 12. A. leucosta- 
Sessile spikelets with a straight fine bristle -like 
awn, 6-9 lin. long ... ... 13. A. eucomus. \_/ 
Hairs of joints and pedicels as long as these or 
slightly longer ; sessile spikelets 2-24 lin. long, 
awned 14. A. hidllensis. ^ 
Racemes not plumose ; hairs of joints and pedicels 
much shorter than these, rarely 0 (17, A. 
Brazzce) ; pedicelled spikelets almost as large 
as or as large as the sessile, neuter, but mostly 
with both glumes and valves developed, or more 
usually 6 . 
