46 A NEW DENDROBIUM FROM THE RHIO ARCHIPELAGO. 



Ehio. Oolitur in Singapur a B. K. Saheb. floruit m£nse 

 Oetobri et mense Novembri. 



This species is near Dendrobium longipes, Hook. f. and D. 

 macropodium, Hook, i., the former especially. It is much more 

 slender than either, and indeed is a really graceful little orchid. 

 From D. longipes it differs also in its narrow petals and the 

 straighter side to the lateral lobes of the labollum. These lateral 

 lobes are folded upwards so as to make the walls of the rectangular 

 tunnel into which insects are invited that they may fertilise the 

 flowers. The mid lobe of the labellum is very much as in D. 

 longipes (vide Hooker's I cones plantarum, plate 2617) : its bright 

 yellow centre set off by the purple at its back on the side lobes and 

 the reddish brown in the back under the column. The rest of the 

 flower is ivory white. The long slender ovaries arc as in T). longipes, 

 and as in D. macropodium. 



On the whole the flower superficially suggests a Coelogyne. 



Jour. Straits Branch R. A. Soc, No. 79. 



