ORCHIDACE.E 



internodii 1.5-1.7 cm. longi, graciles, nodii nigro-annulati. Inflo- 

 rescentia uniflora. Pedicellus cum ovario 4-5 mm. longus. Flores 

 albidi, minuti. Sepala lateralia ovata, acuta, circiter 5 mm. longa, 

 vix 3 mm. lata, trinervia. Sepalum dorsale ovato-lanceolatum 

 4 mm. longum, vix 2 mm. latum, trinervium ad apicem attenua- 

 tum. Petala linearia, ad apicem truncato-apiculata, 4 mm. longa, 

 circiter 1 mm. lata, trinervia. Labelium antice 4-5 mm. longum 

 usque ad apicem pedis columns affixum, lobis lateralibus obso- 

 letis, lamina ad apicem profunde bilobum, lobulis divergentibus 

 usque ad 2 mm. longis, 1.5 mm. latis, insequaliter rotundatis, 

 ad basim lamella transversa, lamella papilla porrecta instructa. 

 Mentum valde obtusum, 2 mm. longum. Gynostemium 2.5 mm. 

 longum, erectum, ad apicem integra. 



Dendrobium unicorne is a near ally of D. parietiforme J. J. 

 Smith from Celebes. It is distinguished from that species by the 

 more deeply bilobed apex of the labelium, by the obscure lateral 

 lobes, and by the horn-like projections on the callus that stand 

 in front of the opening to the sac. The labelium in Z>. parietiforme 

 is much more fleshy than in either D. unicorne or D. purpureo- 

 stelidium, and is distinctly apiculate. The column of JD. unicorne 

 is entire at the tip with a large membranous hood partly sur- 

 rounding the androclinium. The flower arises from the pseudo- 

 bulb at the back of the leaf. 



What appears to be the same species is represented in the 



herbarium of the Bureau of Science by a single specimen. 



Leyte, Jaro, C. A. Wenzel 0292, March 8, 1914. Sepals, petals, and la- 

 belium white. Epiphyte. Altitude 500 meters. "Leaf thick, pseudobulb 

 channeled." Luzon, Laguna Province, San Antonio, Maximo Ramos Bur. 

 Set. 14987, June 13, 1912. 



77. Dendrobium Usteri Schltr. ex Usteri Vierteljahrsschrift 

 der Naturforschenden Gesellschaft in Zurich 56:450 (1906); 



[141 ] 



