Sorghum.\ clvii. gramine^: (Stapf). j 113 
greenish upwards, on maturity often turning bright red or brownish- 
red below the middle or upper third, finely awned ; callus-beard 
i lin. long. Glumes about equal, coriaceous and more or less glossy 
to beyond the middle, papery and striate upwards, lower about 
13-nerved, finely 2-keeled towards the tips with the keels scabrid, 
sparingly and very ^finely .white-strigillose to almost glabrous, upper 
7-nerved with a slender almost smooth keel upwards, glabrous or 
almost so. Valves ciliate, lower lanceolate-oblong, 3 lin. long, 
upper ovate-oblong, 2-lobed to a quarter, 2-2^ lin. long ; awn up 
to 8 lin. long, bristle loosely twisted. Grain obovate-oblong, dorsally 
compressed, 1 J lin. by 1 lin., more or less fuscous above, paler below ; 
embryo-mark indistinct, about half the length of the grain. Pedi- 
celled spikelet linear to linear-lanceolate, acute, about 4 lin. long, 
glabrous, $ or more or less reduced ; lower glume 9-11-, upper 
5-nerved ; anthers 2 lin. long. — Andropogon Sorghum, near var. 
sudanensis, Piper in Proc. Biol. Soc. Wash, xxviii. 34. 
Upper Guinea. North Nigeria : Katagum District, by rivers, Dalziel, 293 ! 
Nileland. Upper Nile Province : White Nile ; Kio rubber plantation, 
Broun, 1473 [ 
The Hausa name, according to Dalziel, is Dawar rafi. 
Two specimens from Senegambia ( Heudelot , No. 544 and 654) also belong 
probably here, but they have rather smaller spikelets (not over 3 lin. by 1 lin.), 
more hairy glumes and more scabrid keels, that of the upper being particularly 
sharp upwards. They were referred to Andropogon Sorghum sudanensis 
by Piper, l.c. 34. t 
3. S. sudanense^ Stapf. Annual. Culms relatively slender, 6- 
10 ft. high, about 9-noded, glabrous, slightly pruinose below the 
nodes. Leaf -sheaths very finely and densely silky-pubescent at 
the nodes, otherwise glabrous ; ligules membranous, 1 fin. long ; 
blades linear, the lower long-attenuated towards the base and there 
almost reduced to the stout strongly striate midrib, 6-12 in. by 
4-6 lin., dull green flushed or mottled with purple, glabrous. Panicle 
ovate-pyramidal, erect, 6-12 in. long, up to 6 in. wide at the base ; 
branches obliquely ascending, flexuous, whorled, the longest up 
to 6 in. long, undivided for 1-2 in., nearly glabrous at the base, like 
the branchlets finely scabrid, particularly upwards. Racemes 
fragile, few- to 5-noded, up to 1 in. long ; joints slender, about 2 lin. 
long, ciliate, cilia pale fulvous or whitish, J lin. long ; pedicels 
similar, of equal length or very slightly shorter. Sessile spikelet 
lanceolate to elliptic-oblong, subacute, 3 lin. by 1J lin., pale straw- 
colour to pale fuscous with dull greenish striate tips when young, 
awned ; callus-beard inconspicuous, J lin. long. Glumes equal, 
coriaceous, thinner upwards, more or less glossy, lower about 13- 
nerved, 2-keeled above the middle with the keels scabrid, very 
finely and shortly strigillose (sometimes sparingly), hairs dirty-white 
to pale fulvous, upper finely keeled upwards, 7-nerved, almost 
glabrous apart from the cilia. Valves conspicuously ciliate, lower 
FL. TROP. AFR. VOL. IX. I 
