224 
CLVll. GRAMINEiE (Stapf). 
[Andropogon. 
below the middle ; valvule 0. Anthers 1| lin. long. Pedicelled 
spikelets $ or neuter, rarely broad-lanceolate, 3 lin. long, greenish 
or somewhat livid ; lower glume submembranous , very sparingly 
hairy to glabrous, unequally 2-dentate, with a bristle 3-3J lin. long 
from between the teeth, keels narrowly winged, intracarinal nerves 
numerous, close, fine, the middle one more distinct ; upper glume 
subhyaline, acutely acuminate, with a bristle about 1J lin. long, 
3-nerved ; valves of both florets delicately hyaline, sparingly ciliate, 
of the lower 2-nerved, of the upper nerveless and shortly 2-fid, 
2J and 2 lin. long respectively. Anthers (if any) over 1 lin. long- 
Hack. in DC. Monogr. Phan. vi. 466 ; Durand & Schinz, Consp. FI. 
Afr. v. 720 ; K. Schum. in Engl. Pfl. Ost-Afr. C. 98 ; Chiov. in 
Ann. Istit. Bot. Roma, viii. 282. 
Nile Land. Eritrea; : Amasen ; At-Zien, 8200 ft., Pappi, 5295 (a) ; Asmara. 
Pappi, 4347 (a), 4360 (/3) ; between Halibaret and Asmara, Tellini, 678 (/3) ; 
between Halibaret and Amba Derho, Tellini, 968 (/3) ; Sala Dharo, 7550 ft., 
Pappi , 2296 (a, 5) ; Bogos ; Keren, Tellini, 874 (a, 1) ; Sarae, along the Mareb 
near Debarroa, 6200 ft., Pappi , 500 (a. 1) ; near Gundet, 5570 ft., Pappi, 357, 
374 (a, 5) ; Gaza Gobo, 7550-8200 ft., Pappi, 116, 187, 222, (a, 2) 200 (a, 5 ) ; 
Adi Ugri, 6200 ft., Pappi, 32 (a, 5) ; Schimezano ; plateau of Gheleba, 8150 ft., 
Pappi, 831 (/?) ; Ocule Cusai ; Deca Mere, 6550 ft., Pappi, 2443 (a, 5). Abys- 
sinia : hills near Adowa, Schimper, 290 (a, 1) ! 1115 (a, 4) ! 1981 (a, 1) ! Loetho, 
8000 ft., Schimper , 476 (a, 1 & 3) ! Debra Eski, Schimper (a,- 2) ; near Gapdia, 
Schimper, 805 (a, 3) ! and without precise locality, Schimper, 223, (a) (/3). 
Hackel, l.c., distinguishes 2 varieties, one of them with 5 subvarieties. 
They may be keyed as follows, the letters and numbers used in the key and in 
the above enumeration corresponding to his designations. 
Pedicelled spikelets 6 , their fertile valve muticous, 2- 
dentate a. genuinus. 
Sessile spikelets 3-3t lin. long, ovate- or broad-lanceo- 
late ; lower glume narrowly or very narrowly winged, 
awn 8-10 lin. long. 
Sessile spikelets more or less hairy ; joints ciliate on 
both sides. 
Racemes lf-2f in. long, wings almost suppressed, 
awn 8 lin. long ... ... ... ... ... a. 1 genuinus . 
Racemes 1| in. long, wings narrow, awn 10 lin. 
long ... ... ... ... ... ... a. 2 apterus. 
Sessile spikelet glabrous ; joints ciliate on one Jde only ; 
racemes 1|— If in. long ; wings narrow ; awn 8^ lin. 
long (A. glaibrescens, Hochst. ex Hack. l.c. 467) ... a. 4 glabrescens. 
Sessile spikelets 4-5 lin. long ; racemes 3-3| in. long ; 
joints ciliate on both sides. 
Sessile spikelet glabrous, lanceolate, wings indistinct 
and short ... ... ... ... ... ... a. 3 scabriglumis. 
Sessile spikelet hairy, broad ovate-lanceolate, wings 
broad a. 5 multinervis. 
Pedicelled spikelets £ , their fertile valve awned ; racemes 
to over 4 in. long ; sessile spikelets 5 lin. long, ovate- 
lanceolate, hairy, wings narrow ( A . plagiopus, Hochst. 
ex Hack. l.c. 467) ... ... ... ... ... j3. plagiopus . 
I suspect that all these forms are either determined by conditions of nutrition 
or come within the range of individual variations. The size and width of' the 
