120 
CLYII. GKAMINEiE (Stapf). 
[ Sorghum . 
awned ; callus-beard \ lin. long. Glumes equal, coriaceous, thinner 
upwards, lower 13-nerved, sharply 2-keeled and spinulously cilio- 
late above the middle with the apex running out iijto a hyaline beak 
between the abrupt tooth-like keel-ends, white-tomentose, almost 
silky, glabrescent over the more bulging portions of the back, lower 
7 -nerved, sharply and narrowly keeled towards the tip, with the keel 
scabrid, more or less tomentose on the sides and upwards. Valves 
conspicuously ciliate, lower broad-oblong, 3 lin. long, upper ovate* 
2-lobed to a quarter or almost 2 J lin. ; awn 10-12 lin. long. Anthers 
2 lin. long. Grain obovate-ellipsoid, 1J lin. by 1 lin., brown, paler 
below ; embryo-mark distinct, very broad, about half the length 
of the grain. Pedicelled spikelet <J (or neuter and then more or 
less reduced), linear-lanceolate, acutely acuminate, up to 4 lin. long, 
greenish or reddish to bright red, more or less appressedly hairy ; 
lower glume 10-, upper 7-nerved, nerves rather marked ; anthers 
1J lin. long. — Andropogon cethiopicus, Rupr. ex Steud. Syn. PI. 
Glum. i. 372. A. Sorghum, subsp. halepensis, var. cethiopicus, Hack, 
in DC. Monogr. Phan. vi. 504 ; Durand & Schinz, Consp. FI. Afr. 
v. 723, partly ; Chiovenda in Ann. Istit. Bot. Roma, viii. fasc. i. 24. 
A. Sorghum cordofanus, Piper in Proc. Biol. Soc. Wash, xxviii. 39 ; 
excl. syn. A. cordofanus, Hochst. 
Nileland. Nubia : Sagadi, between Suakin and Berber, Schweinfurth, 599 ; 
Wadi Eremit, Schweinfurth, 655 ; Kordofan ; Arash-Kol Mountain, Kotschy , 
173 ! 390 partly ! Sudan : on the Blue Nile, Muriel, L. 13 ! and without 
precise locality, Kotschy, 132 ! 
A short-awned state was described by Hackel, l.c., 505, as subsp. breviari- 
status from Sorghum fields on Arash-Kol ( Kotschy , 158 !). It is also recorded 
by Chiovenda from various places in Eritrea, namely the islands of Dilemmi 
( Terracciano , 797), Assarke ( Terracciano , 745) and Hotha ( Terracciano , 791), 
from Samhar, Otumlo {Pappi and Terracciano, 2582), Barca, Agordat, 1600 ft. 
[Pappi and Terracciano, 2813), Agordat-Adarti, 2660 ft. (Pappi & Terracciano, 
2758) ; Adag-Adarti, 2660 ft. ( Pappi & Terracciano, 2725) and from Gerba, 
Gasch ( Bartolommei-Gioli ). Kotschy’s specimen has a denser panicle than the 
type, whilst the spikelets are somewhat broader and possess rather large trian- 
gular subherbaceous tips. It may be a cross between 8. cethiopicum and 8. 
Durra. Hackel (l.c. 505 : see also Durand & Schinz, Consp. El. Afr. v. 723) refers 
to it a specimen collected by Marloth at Barmen in Damaraland ; but Piper 
considers it distinct, and I suspect it to be 8. arundinaceum. Other specimens 
collected by Hartmann on the Blue Nile in Sennaar, and referred by Schwein- 
furth (PI. Nilot. 43) to Sorghum halepense, var. Crupina, are said by Hackel to 
be intermediate between S. cethiopicum and 8. virgatum. According to Schwein- 
furth’s very full description they seem to me to be S. cethiopicum. 
This is one of the most distinct species of this difficult group. Piper’s name 
“ cordofanus ” is based on the mistaken identification (probably owing to a 
confusion of labels) with Andropogon cordofanus, Hochst. ( Kotschy , 54 !) which 
is Andropogon gay anus, var. cordofanus). 
10. S. panicoides, Stapf. Annual. Culms slender. Leaf -sheaths 
(upper only known) pubescent at the nodes ; ligules a fringe of 
hairs about 1 lin. long ; blades linear from a hardly widened base, 
tapering to a fine point, about 1 ft. by 8 lin., hairy behind the ligule, 
