351 
C © - Bagal leaf-sheaths ultimately loosened and curled ; blades 
flat ; raceme-fascicles compound . .. 2. C. Jwarancusa. 
Panicles more often large and very compound ; raceme- 
, joints glabrous or pubescent on the back, bearded along the 
“ * sides, hairs increasing in length upwards, but not concealing 
the sessile spikelets; awns, if present (they are normally 
absent in the cultivated forms), distinctly geniculate with the 
knee exserted (Series Citratz) :— 
Sessile spikelets lanceolate or ovate- or obovate- a : 
— back flat :— 
g@ Lowest pedicel of raceme scarcely stouter than the 
upper :— 
2 All the spikelets awnless . . . . 3. C. Nardus. 
2© Sessile spikelets awned :— 
Panicle erect, dense, often interrupted, with 
rather conspicuous, frequently purplish-brown to 
blackish spathes . . . A. C. confertifiorus. 
Panicle loose, with Je. long, flexuous, often 
drooping branches and comparatively inconspicuous 
spathes, the whole panicle often greyish . : 
Dank. flecuosus. 
4 Lowest pedicel of racemes much swollen; panicles 
erect, narrow, often interrupted, the divisions short, 
dense ; spathes and racemes short, the white hairs of the 
joints and panicles often very conspicuously contrasting 
with the pale brown spikelets . . . . 6. C. coloratus. 
Sessile spikelets linear to lanceolate-linear, awnless ; back 
“distinctly concave in the lower part; panicle usually 
loose ; branches slender, the ultimate branchlets more or 
less nodding ; ; spathes long and narrow ; hairs of joints and 
pedicels rather spreading . ... .. 4%. .C. citratus. 
Perennials, sometimes flowering the first year (or sometimes 
“annuals ?); innovations mixed (extravaginal and intravaginal), 
sie 5 fascicles from a short collar or very short, slender, 
oblique rhizome; old culms naked at the base or ‘with the 
withered remains of the basal leaf-sheaths; blades flat, 
5-30 mm. wide, rounded to subcordate and stem-clasping at the 
base, of a soft texture, with smooth edges (at least in the lower 
part) ; the first (outer) glume of the sessile spikelet with a narrow 
groove from the middle downwards corresponding to a keel inside 
(Series J?usae) :—. 
ve Culms in loose, rather scanty fascicles, erect and simple or 
- nearly so, usually tall and robust; basal sheaths soon 
withering ; blades 10-30 mm. wide (rarely under 10 mm.), 
somewhat fat, rich green, at least above; panicles 10-30 cm. 
long, rather loose, turning reddish (often very bright) when 
MIGbUre 3 ys 4 Mee «3s aoe C.. Marine. 
Let Culms in sanewhat peas ohana copious fascicles, erect or 
’ geniculately- ascending, very slender, frequently branched, 
| the branches often in fascicles from the knees of the culms ; 
sheaths soon withering; blades 2-6 mm. wide, thin, glaucous; 
panicles usually loose, 10-20 cm. ae glaucous or straw- 
colour when mature a park ae a pba a C. caesius, 
