116 clvii. GrUAMiNE^ (Stapf). [Sorghum. 
5. S. vogelianum A \tapf. Annual. Culms stout, 6-15 ft. high, 
simple, glabrous. Leaf -sheaths delicately silky-pubescent at the 
nodes, otherwise glabrous ; ligules up to 1 lin. long, scarious, usually 
hairy on the back ; blades lanceolate-linear from a broad rounded 
base, long-attenuated upwards, up to over 2 ft. by almost 2 in., 
green flushed or blotched with red, glabrous apart from a narrow 
tomentose zone immediately behind the ligule. Panicle erect, 
pyramidal or ovoid, loose, up to 1J ft. by 9 in. ; branches whorled, 
obliquely ascending or spreading, slender, flexuous, longest to over 
9 in. long and undivided to up to 1 in. from the base, distantly 
branched, villous (often very densely) at the base, like the branchlets 
very rough, often spinulously ciliolate, particularly upwards. 
Racemes fragile, 2-7-noded, up to 1J in. long ; joints slender, 2 lin. 
long, densely ciliate, cilia fulvous to rufous, J-J lin. long ; pedicels 
similar, of equal length or slightly longer, tips slightly thickened. 
Sessile spikelet oblong-lanceolate, acutely acuminate, 4-4J lin. 
long, dark straw-colour to tawny, dull greenish upwards, awned or 
awnless ; callus-beard fulvous, \ lin. long. Glumes equal, cori- 
aceous, and more or less glossy to beyond the middle, then thinner, 
lower about 13-nerved with the nerves very obscurely raised near 
the tips, sharply 2-keeled and spinulously ciliolate from the middle 
upwards, fulvously to almost rufously strigillose, hairs loosely 
appressed or slightly spreading, soon glabrescent on the back, upper 
sharply keeled (with keel rough) towards the slender tip, 7 -nerved, 
glabrous or nearly so. Valves conspicuously ciliate, lower broad- 
lanceolate, up to 3J lin. long, upper ovate, shortly 2-lobed or sub- 
entire, 2 lin. long ; awn up to 7 lin. long, often reduced to a short 
bristle or mucro. Anthers 2 lin. long. Grain unknown. Pedi- 
celled spikelet usually $ , sometimes more or less reduced, linear- 
lanceolate, long-acuminate, up to 4 lin. long, dull greenish, glabrous ; 
lower glume about 11 -nerved, spinulously ciliate upwards, upper 
5-nerved. — A. Sorghum vogelianus , Piper in Proc. Biol. Soc. Wash, 
xxviii. 34. 
Upper Guinea. Southern Nigeria : banks of Nun River, Vogel, 1 1 ! Lau and 
Amar, by the Benue River, Macleod, 49 ! 60 ! 62 ! 65 ! Idu, banks of Eugenni 
River, Holland, 153 ! Oban, Talbot, 846 ! Cameroons : by the Cameroon 
River, Mann, 2109 ! Karnak Logome, Macleod, 151 !. 
Holland, 153, is a meagre specimen with small panicles and narrow leaves ; 
but he says the plant grows up to 15 ft. high, and the spikelets are exactly 
as in Vogel’s plant. Mann, 2109, and Macleod, 157, have also smaller panicles 
and narrower leaves and the indumentum of the racemes is pale. 
rsjfriL ) 
6. S. verticilliflorim* Annual. Culms 4-8 ft. high, some- 
times slightly pruinose oelow the nodes. Leaf-sheaths delicately 
silky -pubescent at the nodes ; ligules up to over 1 lin. long, scarious, 
hairy on the back ; blades linear from a broad rounded and often 
clasping base, long-attenuated upwards, up to 1J ft. long, rarely 
much over 1 in. wide, green, sometimes slightly glaucous or flushed 
