30 
CL VII. GRAMINEiE (Stapf). 
\Ischcemum. 
long; joints and pedicels cuneate (the latter more slender), 14-3 lin. 
long, hollow, convex on the back, glabrous, angles ciliate. Sessile 
spikelet lanceolate, 24 lin. long, bearded at the obtuse callus. 
Glumes equal ; lower herbaceous-chart aceous, acute to subacute, 
dorsally depressed, scantily hairy along the middle, keels scabrid, 
intracarinal nerves 2-4 ; upper subchart aceous, ovate-lanceolate, 
boat-shaped, acute, 5- to sub-7-nerved, nerves anastomosing, keel 
ciliate. Lower floret S • valve lanceolate, acute, slightly shorter 
than the glumes, hyaline, glabrous ; valvule of the same length, 
ciliate, 2-nerved. Upper floret $ : valve equalling the lower floret, 
oblong, 2-fid, 3-nerved, lobes lanceolate, ciliolate, awn very slender, 
3 lin. long, kneed at the middle, column smooth ; valvule oblong, 
14 lin. long. Anthers 1J lin. long. Pedicelled spikelet about 14 
Jin. long, reduced to the lower glume which is similar to that of the 
sessile spikelets. — Rendle in Journ. Linn. Soc. xl. 225. 
South Central. Rhodesia : Gazaland ; Umhlonhlo, Lower Buzi River, 
Swynnerton, 1573 ! 
Also in the Transvaal. 
2. I. brachyatherum, Fenzl ex Hack, in DC. Monogr. Phan. vi. 
239. Densely csespitose. Culms up to over 3 ft. high, slender, erect, 
simple, 5-6-noded, glabrous, smooth, terete. Leaf-sheaths terete, 
tight, striate, those of the innovations very firm and long persistent, 
hirsute at the base, all the others quite glabrous and smooth ; ligule 
scarious, up to 1 lin. long, truncate, glabrous or ciliolate ; blades 
linear, very long tapering to a setaceous point, up to 1 ft. long, and 
to 34 lin. wide, firm and somewhat rigid, glabrous and smooth 
excepting the margins which are rough upwards, nerves prominent. 
Racemes in pairs or threes, rarely solitary or more than 3, the lower 
shortly peduncled, erect, rigid or flexuous, straw-coloured or slightly 
tinged with purple, moderately hairy ; joints very stout, club-shaped, 
2-2J lin. long, glabrous or more or less hairy to villous on the back, 
shining, angles ciliate ; pedicels similar and parallel to, but distant 
from the joints and of about equal length, shortly ciliate on the 
outer angle. Sessile spikelet lanceolate, mostly 3J-4 (rarely under 
3) lin. long, shortly bearded from the obscure callus, beard whitish 
or purplish, absent from the lowermost spikelets. Glumes equal ; 
lower lanceolate, subacuminate, minutely 2-dentate, sometimes 
with a more or less oblique tip, chartaceous, concave on the back, 
glabrous or sparingly hairy to villous, keels scabrid, intracarinal 
nerves 3-5, with some transverse veins above ; upper boat-shaped, 
obliquely lanceolate in profile, glabrous or very sparingly hairy, 
membranous, 5-9-nerved, keel scaberulous or ciliate above, lateral 
nerves faint. Lower floret <$ : valve lanceolate, acute, slightly 
shorter than the glumes, hyaline, 2-nerved, ciliolate ; valvule of the 
same length, lanceolate, long and finely acuminate, hyaline and 
nerveless. Upper floret $ ; valve oblong, 2-fid to J or J, with 
