268 
clvii. gramine^j (Stapf). [Cymbopogon. 
up fco 1 ft. long, bearing blades up to 3 ft. by 3-9 
lin. ... 10. C. citratus. 
**Perennials, sometimes flowering the first year (or some- 
times annuals ?) ; innovations mixed (extra vaginal 
and intravaginal) ; old culms naked at the base 
or with the withered remains of the basal leaf- 
sheaths ; blades flat, 3 lin. (rarely less, 13, C, 
ccesius) to over 1 in. wide, rounded to subcordate 
at the base, of a soft texture with smooth edges (at 
least below) ; the lower glume of the fertile spikelets 
flat on the back with a fine acute median groove. 
Lower glume of fertile spikelet 2-2| lin. long, with the 
keels winged, awn distinctly differentiated into 
column and bristle, 3-8 lin. long. 
Panicle 3-6 in. long, rarely more, moderately com- 
pound ; leaf-blades 3-6 lin. wide (see 13, C. 
ccesius). 
Base and adjacent pedicel of the sessile raceme 
not connate ; fertile joints and adjacent pedi- 
cels very shortly ciliate throughout ; lower 
glume of fertile spikelet with conspicuous 
long oil-streaks on both sides of the groove 11. C. nervatus. 
Base and adjacent pedicel of the sessile raceme 
connate ; fertile joints and adjacent pedicels 
rather conspicuously ciliate, cilia rapidly in- 
creasing in length towards the tips, the upper- . 
most 1 lin. long ; lower glume of fertile spikelet 
with obscure and short or no oil-streaks. 
Culms simple below, rarely with a long branch 
from below; leaves dull green or sub- 
glaucous, blades 3-6 lin. wide ; joints and 
pedicels shortly ciliate at the sides ... 12. C. excavatus. 
Culms frequently branched below, the branches 
often in fascicles from the knees of the 
culms, slender and wiry ; leaves bluish- 
glaucous, blades 1-5 lin. wide ; joints and 
pedicels densely villous-ciliate ... ..,13. C. ccesius. 
Panicle frequently over 1 ft. long, decompound ; 
blades up to over 1 in. wide at the base ; joints 
and pedicels densely ciliate ; base and adjacent 
pedicel of sessile raceme connate ; oil-streaks 
confined to the upper third or quarter of the 
lower glume of the sessile spikelets 14. C. giganteus. 
Lower glume of fertile spikelet 1| lin. long, wingless ; 
awn a fine bristle continuing the stipe-like valve 
and, including it, up to 2\ lin. long ; panicle very 
dense and compact, ovoid to oblong or sub- 
globose, more rarely narrow and interrupted ; 
blades ^-1 in. wide ; joints and pedicels very 
shortly ciliate ; base and adjacent pedicel of 
sessile raceme not tumid nor connate 15. C. densiflorus. 
1. C. Schcenanthus, Spreng. Pug. ii. 15, not of Schuli. Perennial, 
compactly csespitose, with numerous intravaginal innovations, 
J-1J ft. high. Culms erect, slender, few- to 4-noded and simple 
below the inflorescence, terete, glabrous, very rarely with a few small 
