34 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. 
(a) Mouth of the leaf-sheaths smooth, or armed with spines variously directed, 
* Fruit resiniferous. 
T Leaf-sheaths armed with feeble, acicular, deciduous spines, Dragon- 
blood secretion very abundant, 
Leaf-sheaths armed with slender feeble seriate spines. Leaflets 
linear-lanceolate, 30 cm. iong, 2 cm. bread, bristly on 3 
nerves on both surfaces. Fruit ovoid, shortly beaked or 
mamuiilate. Seed somewhat flattened, ovoid. 
388. D. Draco. 
Leaf-sheaths armed with feeble, seriate, easily deciduous spines, 
Leaflets very narrow (7—9 mm. in width’, smooth above, 
and with 3 bristly nerves beneath. 
39. D, Draconcellus. 
Leaf-sheaths .armed with numerous, very slender, often seriate, 
easily deciduous spiculae, resting on bulbous permanent bases. 
Leaflets linear-lanceolate, finely and closely ciliate on 3 
nerves on both surfaces, 
40. D. micracanthus. 
Tf Leaf-sheaths armed with rather strong permanent spines, of which 
some at least are flat and elongate. 
§ Female spikelets with bifarious flowers, 
© Lesflets equidistant or nearly so, never geminate. 
+ Scandent. 
Leaflets with 3 bristly spinulous neryes on the upper 
surface and the mid-costa alone bristly beneath. 
Fruit strongly resiniferous, ovoid-pyriform or with 
a broad base and a more or less conical apex. 
Seed conical. 
41. D. propinquus. 
Leaf-sheaths with 3 bristly nerves on the upper 
surface. Fruit spherical, comparatively large, 
sparingly resiniferous, 
42. D, ruber. 
Leaflets not bristly on the upper surface, or only 
very slightly on the mid-costa. Fruit broadly 
ovoid with a broad base, slightly resiniferous. 
43, D. mattanensis. 
