ORCHIDACE^E 



4. D. plicatile Lindl. The middle lobe is nearly quadrate, fleshy, and 

 oddly folded. 



* 5. D. pseudoconvexum Ames. 



* 6. D. purpureostelidium Ames. 



7. D. scopa Lindl. The terminal lobe of the labellum is deeply fringed, 

 the lateral lobes are triangular, minutely toothed in front. 



* 8. D. unicorne Ames. 



Nos. 1, 2, 3, 5, 6, and 8 are described in detail below. 



2. § Diplocaulobium. In the Philippine flora, if we except 

 D. longicolle Lindl., which I have not seen among the collections 

 I have examined, only one species of this group is known. It is 

 characterized by an elongated, rigid, unbranched, erect stem, at the 

 summit of which is a single, ligulate, leathery leaf. In the axil of 

 the leaf is an erect sheath from which the elongated slender pedi- 

 cel and its solitary purplish flower arises. The sepals are caudate. 



1. D. Clemensia? Ames. 



3. §Bolbidium. This group is recognized by means of its short, 

 rigid, slender, erect, thickened stems, terminated by a pair of 

 leathery leaves and ephemeral flowers. 



* 1. D. cabadbarense Ames. 



2. D. hymenanthum Reichb.f. 



4. §EuPHLEBiUM.The swollen, fusiform pseudobulb which ter- 

 minates the stem rises weakly from the rhizome and droops; the 

 stem between the pseudobulb and the rhizome is very slender. 

 Leaves, two at the summit, lanceolate, 1 dm. long. Flowers of brief 

 duration, not hairy. 



1. D. spurium J. J. Smith. 



5. § Sarcopodium. Readily distinguished by the tetragonal, 

 yellow, glossy pseudobulbs close to the rhizome, terminated by a 

 pair of oblong-elliptical leathery leaves and a showy raceme of 

 yellowish or purplish flowers. 



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