THE ORCHIDOLOtlY OF INDIA. 7 



87. D. Rabani; pseudobulbis subcylindraceis monophyllis secus caulem 

 imbricatis, folio oblongo obtuso, floribus parvis sessilibus terminalibus, 

 sepalis petalisque acutis aequalibus, mento brevi, columna bicamerata, 

 labello basi excavato laevi lamina intus villosa medio tuberculata. 



Khasia, in Mr. Raban's garden, at 4000 feet, /. JD. H. (25). 



" Mowers small, white, sweet-scented." I have been unable to 

 ascertain the form of the lip ; but the other characters are amply 

 sufficient to distinguish this. 



** Mores laterales. Labellum margine continuum. 



Some of the supposed species of this section are probably 

 founded on insufficient grounds. D. Farmeri (Bot. Mag. t. 4659), 

 for instance, is scarcely distinct from D. chrysotoxum (Bot. Keg. 

 1847, t. 36), although its flowers are tinged with pink, and its lip 

 less abundantly fringed. In like manner my Z>. palpehrcB ( Journ. 

 Hort. Soc. V. 33) may be a white-flowered variety of D. Griffith- 

 ianum (Bot. Eeg. xxi. 1756). The only species among the col- 

 lections of Hooker and Thomson is — 



88. D. densiflorum, Wallich, Plant. As. rar. t. 40 ; Bot. Mag. t. 3418. 

 Sikkim, at 1000-5000 feet of elevation, J. D. H. (7 and 150) ; Khasia at 



2000-4000 feet, J. D. H. ^ T. T. (7). 



89. D. EUPHLEBiUM (H. G.'Rchb. MSS.) ; eaule angulato clavato basi 

 angustato, foliis geminis membranaeeis ovali-lanceolatis, flore solitario 

 laterali, labello oblongo unguiculato eoneavo emarginato cordato, venis 

 ab axi carnoso rectangulis divergentibus. 



Java, T. Lobb. 



A very distinct plant, remarkable for its clavate angular stem 

 tapering to the base, and solitary lateral flower. 



*** Lahelli lohus medius stuposus (Desmotrichum). 

 The species hitherto known are wholly insular. • 



§ Y. HOLOCHEYSA. 



* Fasciculata ; floribus solitariis, fasciculatis aut breviter 

 racemosis. 

 In proposing now, for the first time, to collect into one group 

 aU the distichous-leaved yellow species, I have no character to 

 rest upon except the uniformly yellow colour of all parts of the 

 flower, a colour disappearing somewhat in D. aureum, whose 

 yellow almost fades into white in the variety called D. rhomheunif 

 just as that of D. Griffithianum disappears in its variety Falpehra. 



