144 
CLYII. GRAMINE^E (Stapf). 
[ Sorghum . 
empty pedicel, instead of one sessile spikelet and 2 empty pedicels. In other 
cases the pedicel of a lower pair bears a <J spikelet or a § spikelet with an 
empty pedicel by its side. Sir Evan James’ specimen is somewhat intermediate 
between the typical form and the variety microstachyum. 
31. S. pogonostachyum, Stapf. Perennial ; rhizome creeping, 
wiry, sending up a small tnft of culms and intravaginal innovation- 
shoots. Culms up to 3 ft. high, somewhat compressed below, slender, 
2-noded, smooth, glabrous. Leaf-sheaths firm, tight, glabrous (also 
at the nodes), smooth, striate, the lowest long-persistent, fuscous or 
lead-grey ; ligules short, firmly scarious, pubescent ; blades very 
narrow, j unciform, laterally compressed, narrowly and shallowly 
channelled towards the base, ending in a short point, up to 5 in. 
by f lin., glabrous, smooth except at the slightly rough tips, striate. 
Panicle very narrow, erect, up to 4 in. long ; rhachis and branches 
smooth and glabrous ; branches paired and unequal or the upper 
solitary, simple, bearing a single raceme, or the longest which may 
be almost up to over 1 in. long with a small lateral raceme, their 
tips discoid. Racemes 3-1-noded ; joints and pedicels alike, finely 
filiform, ciliate, cilia white, up to over 1 lin. long ; joints up to 2| lin. 
long ; pedicels about 2 lin. long. Spikelets narrowly lanceolate, 
subacute, 3 lin. long, pale brown. Glumes equal, chartaceous, very 
minutely truncate, glabrous except for the long-bearded callus, lower 
finely 9-nerved, upper 5-nerved. Valve of lower floret linear-oblong, 
almost 2J lin. long, 2-nerved, ciliate above the middle, of upper 
floret oblong, If lin. long, lobes adnate to the awn, ciliate ; awn 
bristle-like, about 3 lin. long. Lodicules minute, glabrous. 
Lower Guinea. Angola : Benguella ; country of the Ganguellas and Ambu- 
ellas, Gossweiler, 2225 ! 
32. S. bipennatum^ Stapf Annual, up to 4 ft. high. Culms 
erect or geniculately ascending, slender, often rooting from the 
lowest nodes, sparingly branched below or simple, quite glabrous. 
Leaf-sheaths terete, rather tight, quite glabrous except at the silky 
nodes, smooth, produced into auricles along the ligules ; ligules 
short, truncate, scarious, up to 1 lin. long ; blades linear, long- 
attenuated to a fine point, narrowed towards the base, up to 1 ft. 
long, 2-3 lin. wide, subglaucous, glabrous, rarely more or less 
hairy, very finely scaberulous below, scabrid along the cartilaginous 
margins, midrib slender, whitish, lateral nerves obscure. Panicle 
linear-oblong, up to 7 in. long, rather lax ; rhachis smooth, glabrous ; 
branches 8-2-nate, very unequal, the longer divided again, the 
longest up to 2J in. long and up to 6-noded, all capillary with 
slightly thickened tips, smooth, glabrous. Racemes reduced to a 
solitary spikelet accompanied by two slender pedicels, about 2 lin. 
long, elegantly ciliate, cilia whitish, up to 1 lin. long. Spikelets- 
broad-lanceolate, 2-J lin. long, f lin. broad. Lower glume coriaceous 
except at the often scarious minutely truncate tip, finely 9-nerved 
