Andropogon.] clvii. gramine.® (Stapf). 
213 
Culms terete, very tall, with tiers of flowering 
branches from the intermediate and upper 
nodes, bearing corymboid panicles of racemes ; 
blades spinulously ciliate from the base. 
Joints and pedicels shortly ciliate ; sessile 
spikelets awned, 
Racemes up to 1J in. long, on erect straight 
peduncles; pedicelled spikelets neuter. . . 15. A. calvescens. 
Racemes up to 3 in. long, very flexuous, on 
curved peduncles 16. A. tenuiberbis. 
Joints and pedicels glabrous or nearly so ; 
sessile spikelets awnless 17. A. Brazzce. 
Culms compressed below and coated by the strongly 
compressed keeled sheath-bases, up to 3 ft. 
high, simple or remotely branched from the 
upper 1-3 nodes ; racemes numerous or if few' 
then long and flexuous ; blades 4-12 in. long. 
Joints with subcupular irregularly toothed tips ; 
lower glume of sessile spikelet subcoriaceous 
to chartaceous, fulvously hairy, with 4-7 
intracarinal nerves ; fertile valve deeply [ stachyus . 
2 -fid IS. A. chryso- 
Joints truncate ; lower glume of sessile spike - 
let thinner, chartaceous to subchartaceous ; 
fertile valve shortly or obscurely 2-fid. 
Spikelets very pale, greenish, 3~3£ lin. long ; 
lower glume of sessile spikelet without 
intracarinal nerves ; anthers 1-^-2 lin. long 19. A. Stolzii. 
Spikelets a rich violet or blackish-purple, 
the sessile 3-3| lin., the pedicelled 3^-4|- 
lin. long ; lower glume of the sessile 
spikelet with 1 or 2 intracarinal nerves ; 
anthers of sessile spikelet effete, of pedi- 
celled 2£ lin. long 20. A. 'pur'pureus. ^ 
ffRacemes 2-, rarely 3-4-nate ; culms erect, not branched 
and suffrutescent below ; leaf- blades long. 
Cilia of joints and pedicels conspicuous, as long as 
these; flowering branches few; racemes 2-4- 
nate; pedicelled spikelets neuter to rudimentary 21. A. laxatus. 
Cilia of joints and pedicels very short ; racemes 
usually 2-nate ; pedicelled spikelets 6 or neuter, 
but not much reduced. 
Flowering branches numerous ; awn of sessile 
spikelet very fine, column 2-2-| lin. long ... 22. A. africanus. 
Flowering branches few ; awn of sessile spikelet 
relatively stout, column 4 lin. long 23. A. linearis . \s 
**Suffrutescent ; culms much branched below ; branches 
curved ascending, hard ; leaf -blades 1| in. long ; 
racemes 2-nate, silky- villous. 
Racemes 10-15 lin. long ; sessile spikelet 3-3| lin. 
long ; awn 7-8 lin. long 24. A. cyrtocladus. 
Racemes 5-10 lin. long ; sessile spikelet 2|- lin. long ; 
awn very fine, 4 lin. long ~ 25. A. Benin. 
