346 The Philippine Journal of Science 1919 
f?. Leaflets very narrowly lanceolate, 3-costulate; leaflets more 
or less bristly-spinulous on three nerves above and smooth 
underneath; fructiferous spikelets curved-scorpioid; fruit 
spherical, shortly and obtusely beaked, 12 to 13 mm in 
diameter; albumen deeply ruminated; leaf-sheaths armed 
SPRGEE CUSEOTIN, GOINGS sii si ics Seon ccccen 22. C. Samian. 
e’. Leaflets conspicuously inequidistant. 
f’. Leaflets more or less distinctly geminate on each side of the 
rachis, 5-pluricostulate, oblong or lanceolate, the leaflets 
of each pair parallel, that is, not approximate by their 
bases and not divaricating; fruiting perianth pedicelliform, 
the fruit itself furnished with a short, pedicelliform or 
necklike involucrophore. 
- Robust; leaflets very large, pluricostulate oblong-spathulate 
with smooth nerves on both surfaces; 35 to 45 cm long, 
6 to 10 cm wide; fruit spherical, 18 mm in diameter; 
leaf-sheaths unarmed .............2...00..2.-.... 23. C. megaphyllus. 
g- Rather slender; leaf-sheaths armed with slender spines; 
leaflets elliptic-lanceolate or oblanceolate, 15 to 25 cm 
long, 3 to 6.5 cm wide, with five slender costae almost 
smooth on both surfaces .. 24. C. Elmerianus. 
g’. Slender; leaf-sheaths unarmed; leaflets oblanceolate- 
elliptic or oblong-spathulate, 20 to 24 cm long, 5 to 6.5 
em wide, smooth on both surfaces; fruit globose, 9 to 
10 mm in diameter. 25. C. mitis. 
f’. Leaflets 5-costulate, those of each pair very approximate 
by their bases and divaricate; female spikelets having the 
involucrophorum (where known) not the least pedicelli- 
form or necklike, but immersed within its spathel. 
g. Of medium size; leaf-sheaths strongly spinous; leaflets 
elliptic-lanceolate, 22 to 25 cm long, 6 to 6.5 em wide, 
very frequently furnished with one or two rigid spines 
on the midrib above near the base, otherwise smooth 
on both surfaces; fruiting perianth obconical, almost 
spreading 26. C. Reyesianus. 
g’. Slender; leaf-sheaths smooth or very sparingly spinulous; 
leaflets elliptic-lanceolate, 10 to 16 em long, 2 to 3.5 
cm wide, usually furnished with a few erect needlelike 
spines on some of the five costae on the upper surface 
and on the margins or else entirely smooth; fruiting 
perianth almost explanate; fruit spherical, 10 to 11 mm 
in diameter. 27. C. spinifolius. 
g’. Leaf-sheaths 2.5 cm in diameter, armed with short spines; 
leaflets deep green and smooth when dry, almost equally e 
shiny on both surfaces, lanceolate-elliptic, quite devoid 
of hairs or spinules even at the apex and on the margins, 
occasionally furnished above with a robust spinule on 
the midrib near the base; male spikelets flattened- 
pectinate, with contiguous flowers and very approximate 
bracteiform spathels. 28. C. viridissimus. 
f’. Leaflets in distant groups; the latter composed of more than 
two leaflets on each side of the rachis; leaf-rachis smooth. 
1 
g 
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