98 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. 
63. D. Calapparius. 
B. Leaf-sheaths furnished with spines or stiff bristles united by their bases into laminar 
erests or complete annular membranous collars or rings. 
1, Leaf-sheaths with complete annular horizontal collars. 
64. D. verticillaris, 65. D. formicarius., 66. D. crinitus. 67. D. 
annulatus. 68. D. mirabilis. 69. D. pseudo-mirabilis. 70. D. 
Forbesii. 77. D. Sabut. 72. D. oligophylius, 73. D. collariferus. 
74. D. macrophyllus. + 
2. Leafsheaths with oblique spinulose membranous crests only. 
75. D. geniculatus. 76. D. cristatus. 77. D. acanthobolus. 78. D. 
scapigerus. 
C. Leaf-sheaths armed with isolated or confluent spines, not with annular crests 
Spadiz (4 and $J elongate-paniculate when $n flower. Primary spathes 
elongate-lanceolate when open, thinly coriaceous or papyraceous; the outermost 
with two dorsal smooth or spinulose keels. (In D. acamptostachys the primary 
spathes are unknown.) 
79. D. periacanthus. 80. D. virescens, 81. D. longipes. 82. D. 
longispathus, 83. D. acamptostachys. 84. D. ruptilis. 
KEY TO THE SPECIES OF THE SECTION CYMBOSPATHA, *** 
I. Lerf-sheaths not furnished with a distinct ocrea at their apex. 
A.—Stem climbing. 
(a) Spadices sessile or very shortly stalked. 
a. Leaflets linear or linear-ensiform, usually not more than ló—zu mm. in 
width, 
1, Spadices before flowering narrowel into a beak at least as long 
as the body. 
S Outer spathe covered with loug very slenler criniform jspiculae. 
* Spiculae scattered, not entirely licovering the surface of the 
outer spathe. 
of a collective species or “ synspecies” of which D. Jenkinsianus may be assumed as the prototype. Also th 
— of subgeoup B with erect stem (Nos. 25 —31) are very difficult to diseriminate on laccount of the 
insompleteness of Herbarium specimens. They afford no very conspicuons diagnostie characters and are all 
closely related species. 
