Bmchiaria.\ 
clvii. graMineje (Stapf). 
525 
lower broad-ovate, 2-denticulate, 8-10-nerved, without a middle 
nerve, lateral nerves anastomosing ; upper corresponding in 
outline and size to the spikelet, 7-nerved, loosely hairy above the 
middle. Lower floret equalling the spikelet : valve very 
similar to the upper glume but slightly depressed on the back and 
5- or incompletely 7-nerved ; valvule almost as long as the valve, 
oblong, acute ; anthers 1J lin. long. Upper floret slightly 
shorter than the spikelet, broad-oblong, subacute or minutely 
apiculate, white ; valve and valvule crustaceous, smdfttli. 
Lower Guinea. Belgian Congo : without precise locality, Dewevre ! 
Although the racemes arc typically simple, a short secondary raceme may 
be seen occasionally standing out among the spikelets, but without any 
definite order. 
16. B. vittata, Stapf. Perennial (?)> base unknown. Culms 
slender, uppermost internode but one 4J-5J in. long, the following 
4J-6 in. up to the inflorescence branched, quite glabrous. Sheath 
loose, thin, striate, glabrous, the constricted portion at the base 
(sheath-nodes) rather long, brown ; ligules a very narrow ciliate 
rim ; blade lanceolate, attenuated to a fine point, up to 8 in. by 
almost 5 lin., rather thin, quite glabrous or with some very fine hairs 
underneath, nerves numerous, 4-5 primary laterals on the underside, 
margins scabrid. Inflorescence secund, 4-6 in. long, of 3-7 distant 
subhorizontal shortly peduncled or upwards subsessile secund spici- 
form racemes ; common axis very slender, subterete below, angular 
and often triquetrous above, smooth or almost so. Racemes simple, 
2-1 J in. long, 2-seriate, moderately dense or loose ; peduncles up to 
6 lin. long ; rhachis ribbon-like, almost membranous, flat or with 
the scaberulous margins iurolled, up to 1 lin. wide, with a delicate 
zig-zag midrib on the face, internodes f-1 lin. loug ; pedicels ex- 
tremely short, solitary or 2-uate, sparingly puberulous or glabrous 
with subdiscoid tips. Spikelets subcontiguous or distinctly dis- 
contiguous, oblong, somewhat flat on the back, over 2 lin. long, 
acute to subobtuse, pale greenish. Glumes very unequal ; the lower 
very broadly ovate, clasping, obtuse to subacute, half the length of 
the spikelet, thin, finely and prominently 9-nerved, the nerves 
anastomosing ; the upper glume corresponding in size and shape to 
the spikelet, more firmly membranous, finely hairy upwards, 7-nerved, 
the nerves more prominent upwards and there obscurely cross- 
veined. Lower floret as long as the spikelet : valve very similar 
to the upper glume but 5-nerved and depressed between the inner 
nerves ; valvule oblong, subacute, almost as long as the valve ; 
anthers 1 lin. long. Upper floret oblong, obtuse, with a minute^ 
mucro, | lin. longj valve and valvule crustaceous, pale, smooth, 
the latter with rather prominent keels. 
North Central. French Congo : at Bonga on the Sanga River, Schlechtcr 
12663! 
