512 
CLVIT. GRAMlNEiE (Stapf). 
dissimilar, membranous ; lower corresponding in outline and size 
to the spikelet, at first wrapped round the sides of the remainder of 
the spikelet and conspicuously exceeding it, then with the margins 
more or less involute, minutely emarginate, about 12-nerved, with 
the nerve-ends anastomosing and with some cross-veins below them, 
glabrous ; upper glume broadly lanceolate- oblong, acute, not quite 
3 lin. long, 7-nerved with very numerous cross-veins, scantily shortly 
and appressedly hairy ail over. Lower floret g, as long as the upper 
glume- valve membranous, 5-nerved, with the side-nerves on the hairy 
sides, the glabrous back traversed by numerous cross- veins ; valvule 
almost as long as the valve, broad-oblong, subacute, keels finely 
marginate ; anthers • lin. long. Upper floret broad-oblong, 
subobtuse, cuspidate, If lin. long, whitish, dull ; valve and valvule 
crustaceous, obscurely pitted. 
Nile Land ? ? Mariakani, 6400 ft., Kdssiier, 451 ! 
2. B. dictyoneura^ Staff. Perennial, 1 J — 3 ft. high, tufted 
apparently on a short rhizome ; innovations extra vaginal with 
moderately firm glabrous striate cataphylls. Culms slender or some- 
what robust, geniculately ascending sometimes from a decumbent 
base, 4-9-noded, simple, the lower internodes compressed or, like 
the remainder, terete, glabrous, smooth. Leaf-sheaths somewhat 
loose or the uppermost (which are herbaceous) rather tight, the 
lower soon slipping off the culms and inrolled and thus almost 
resembling petioles, LJ-4 in. long, striate, quite glabrous and smooth 
except along the ciliolate or pubescent upper margin and mouth, 
rarely with very fine scattered hairs rising from small pale tubercles ; 
ligules a fringe of hairs ; blades linear to linear-lanceolate, from an 
equally broad slightly rounded base, tapering to an acute point, of 
the basal leaves 2-10 in. by 2J-3 lin., flat, rigid, pale green, somewhat 
thick, quite glabrous or with some hairs at the base, rarely very 
loosely hairy all over, margins cartilaginous, more or less remotely 
and minutely spinulose, nerves fine, numerous, the primary lateral 
very obscurely differentiated below, midrib very slender ; the blade 
of the uppermost leaf very nearly suppressed, subulate. Inflorescence 
at length exserted, secund, often arching, of 3-6 solitary oblique 
distant secund spiciform racemes ; common axis very slender, 
6-12 in. long, often produced above the uppermost raceme into a 
short barren point, semiterete, shallowly channelled or flattened 
adaxillarily, more or less pubescent or hirsute near the nodes and 
on the face, otherwise glabrous or nearly so, slightly scaherulous 
along the angles. Racemes very dense, 7-2 in. long, 2-seriate, the 
ranks closed up or divergent, sessile or subsessile, sometimes with 
1-3 arrested spikelets at the base, straight or slightly arching ; 
rhachis rather flattened, subtrigonous, very slightly wavy or straight, 
J-J lin. wide, often dark purple, loosely setulose-ciliate and scaberu- 
lous along the angles, otherwise minutely puberulous or glabrous, 
