Cymbopogon.] clvii. gramine^j (Stapf). 
287 
this the base and pedicel of the sessile raceme are not fused and are hardly ever 
tumid, whilst the spikelets are broader upwards, chiefly owing to the widening 
of the keel wings. 
13. C. csesius, Stapf in Kew Bulletin, 1906, 341. Perennial, 
tufted, up to 3 ft. high, with intra- and extra vaginal innovation- 
shoots from a short rhizome. Culms erect or geniculate-ascending, 
slender, more or less wiry, frequently branched below, the branches 
often in fascicles from the knees, often many-noded (particularly 
when ascending and branched again), terete, glabrous, smooth. Leaf- 
sheaths rather firm, tight, the lowest mostly short, those placed 
at branching nodes at length thrown aside, inrolling or deciduous, 
glabrous, smooth, usually much shorter than the internodes ; 
ligules very short, rounded, scarious ; blades linear from a scarcely 
narrowed rarely slightly rounded base, tapering to a long setaceous 
point, those of the culms up to over 6 (sometimes almost 12) in. long, 
1-3 (sometimes 5) lin. broad, of the innovations usually much 
shorter, flat, bluish-glaucous, glabrous, smooth, midrib slender, 
primary lateral nerves very fine, 3-4 on each side. Spathaceous 
panicle narrow, mostly 3-6 in. long, rarely much longer, sometimes 
reduced and small, dense or interrupted ; internodes usually 4-6, 
the lowest rarely exceeding a third of the panicle, the following 
gradually decreasing ; lowest primary branch shortly exserted from 
its sheath, undivided at the base, or like the following forming 
mixed or (upwards) uniformly simple-rayed tiers ; rays of ultimate 
tiers 5-3, finely filiform, 3-4 lin. long, glabrous ; lowest subtending 
sheaths with foliaceous blades ; spathes lanceolate, acuminate, 
1-f in. long, subherbaceous, glaucous, sometimes turning reddish. 
Spatheoles narrowly lanceolate, acuminate, 7-8 lin. long, sub- 
herbaceous to scarious, turning dirty straw-colour or slightly reddish ; 
peduncles filiform, 2-|-3 lin. long, glabrous . Kacemes 2-nate, obliquely 
erect, of some pairs at length divaricate and finally epinastically de- 
flexed, 6-7 lin. long, greenish, more or less white- villous, one subsessile, 
the other with a bare base, over 1 lin. long, finely pubescent on the 
inner side, ciliate and thickened upwards, base of the subsessile 
raceme swollen, hard, fused with the equally swollen and hard 
adjacent pedicel ; fertile joints filiform, about 1 lin. long, glabrous on 
the back, densely ciliate on the sides, cilia increasing in length 
upwards up to 1| lin. long, snow-white, tips often cupular with a 
crenulate margin or auricle ; adjacent pedicels very similar. Homo- 
gamous pair 1 at the base of the sessile raceme. Fertile spike- 
lets oblong, slightly wider above the middle, subobtuse, 2 lin. long, 
greenish, glabrous ; callus very small, obtuse, minutely bearded. 
Glumes equal, subchartaceous ; lower minutely truncate, flat on the 
back with a fine median groove in the lower half, keels narrowly 
winged from the middle upwards, intracarinal nerves 1 on each side 
towards the keels, very fine ; upper glume narrow in profile, very 
acute, very narrowly winged above the middle, with 1 delicate 
