32 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. 
Outer spathe faintly two-keeled, Fruit spherical, mucronate, 
D. monticolus var. pinangianus. 
(b) Spadices crowded to the summit of the plant. 
a Spadix when unopened shortly beaked. 
Leaf-sheaths about 3 cm. in diameter, armed with flat, scattered or 
seriate spines. Leaflets of radical leaves not distinctly 3-costu- 
late. The beak of the outer spathe forming the third or 
fourth part of the entire spadix. 
26. D. Lewisianus. 
Leaf-sheaths 15—20 mm. in diameter, armed with solitary or seriate 
but individually distinct spines. Rachis of the leaves of the 
upper part of the plant armed on the lower surface with 
digitate claws; leaflets of the radical leaves distinctly 3-costulate, 
27. D. petiolaris. 
Leaf-sheaths about 10 mm. in diameter, very sparingly armed with 
solitary spines. Leaves of the upper part of the plant very 
small, 15—18 cm. long, inclusive of a very short cirrus; their 
rachis armed on the lower surface with solitary, almost 
straight claws. 
28. D. microthamnus. 
8. Spadix when unopened long or moderately beaked. 
Spadix ventricose, fusiform, suddenly narrowing into a beak as 
long as or longer than the body. Outer spathe armed with 
very many narrowly laminar spines. Leaf-sheaths armed with 
seriate individually distinct spines. 
29. D. tabacinus. 
Spadix fusiform, moderately beaked. Outer spathe entirely covered 
with criniform  crispate spiculae, ^ Leaf-sheaths armed with 
approximate whorls of spines confluent by their bases. 
30. D. calicarpus. 
IL Anomalous.  Leafsheaths with the ocrea transformed into two very long 
stipuliform appendages at the sides of the petiole. 
37. D. ursinus. 
