ORCHIDACE.E 



gulares; lobus medius late ovatus; discus tricarinatus. Gynoste- 

 mium arcuatum. Stelidia lateralia e medio gynostemii orta. Ala 

 apicalis quadrata, tri- vel quadridentata. 



A near ally of D. oxylohum Schltr., but differing from it in 

 details of the flower. Pseudobulb ±2 cm. long, when immature 

 concealed by several loosely sheathing tubular bracts. Leaf 

 about 13 cm. long, 1.4 cm. wide. Peduncle 3 dm. long, compara- 

 tively stout, naked below the raceme, arching. Raceme about 

 22 cm. long. Flowers numerous, about forty, pale yellow, compar- 

 atively large, ±8 mm. long, about 5 mm. distant. Bracts spread- 

 ing, 4 mm. long, about 2 mm. wide, slightly exceeding the pedi- 

 cellate ovary, glumaceous, acute. Lateral sepals about 8 mm. 

 long, 2 mm. wide, oblong-lanceolate, acute. Dorsal sepal simi- 

 lar. Petals 8 mm. long, 2 mm. wide, oblong-ovate, abruptly acute. 

 Labellum 7 mm. long, 4 mm. wide at the middle, three-lobed ; 

 lateral lobes about 1 mm. long, entire or few and inconspic- 

 uously toothed, narrowly triangular, very acute but not seta- 

 ceous, about equaling the middle of the labellum ; middle lobe 

 about 5 mm. long, broadly ovate, obtuse. Disc tricarinate to 

 about the middle or a little beyond ; the lateral carinae, one on 

 each lateral nerve, prominent at the base of the column, some- 

 what rounded when seen from the side, the middle carina simply 

 a thickening of the disc along the median nerve. Gynostemium 

 abruptly arched, rather slender. Lateral arms narrowly lanceo- 

 late, 2 mm. long, blunt or subacute, retrorse, arising just below 

 the stigma. 



Unfortunately the only material secured has an immature 

 pseudobulb with its leaf still folded. 

 LoBONG, Clemens 116, November 1915. 



l8. Dendrochilum longirachis Amessp. nov. Pseudobulbi 



elongati, approximati, cylindracei, monophylli. Folium elliptico- 



[60 ] 



