ORCHIDACEiE 



lanceolate, divergent lateral lobes and terminated by a minute 

 cusp or mucro ; behind the terminal lobes a pair of smaller lobes is 

 situated. Callus U-shaped, the arms extending to the middle of 

 the disc. Gynostemium 1 mm. long. Stelidia basal, linear, obtuse, 

 equahng the entire, obtuse terminal wing or slightly exceeding it. 

 The general aspect of the flower suggests close affinity with 

 D. quinquelobum, D. kinabaluense^ and Z). Gibbsiae, but the 

 plants are diminutive with linear leaves and the lobing of the 

 labellum indicates fundamental differences. In outhne the divar- 

 icate terminal lobes of the labellum suggest species of Liparis 

 that belong to the characteristic group of which Liparis pallida 

 and L. lati folia are well-known examples. (Plate 85.) 

 KiNABALU, Haslam, July— August 1916. 



12. Dendrochilum imbricatum Ames sp. nov. Pseudobulbi 

 aggregati, cylindracei, in sicco graciles. Folium petiolatum, ob- 

 longo-ellipticum, acutum. Pedunculus elongatus. Racemus brac- 

 teis imbricantibus, arcuatus. Bracteae flores aequales. Sepala lat- 

 eralia oblongo-lanceolata vel triangulari-lanceolata. Sepalum 

 dorsale simile. Petala oblonga. Labellum trilobatum, tricarina- 

 tum. Gynostemium breve. Ala apicalis retusa vel trilobata. 

 Stelidia lateralia gynostemio multo breviora. 



Pseudobulbs contiguous, cylindraceous, elongated, ±6 cm. 

 long, slender in dried specimens, scarcely 5 mm. in diameter, 

 when immature concealed by a large elongated brownish 

 sheath ±1.5 dm. long, which also incloses the petiole of the leaf 

 and the base of the scape. Leaf large, chartaceous when dry, 

 ±3 dm. long, up to 4.5 cm. wide, oblong-elliptic, acute, mid-vein 

 very prominent beneath. Petiole ±1.5 dm. long, slender. Pedun- 

 cle exceeding the leaves, naked, with several large imbricating 

 bracts at the base of the raceme. Raceme ±2.5 dm. long, arched. 



Floral bracts large, ovate-elliptical, at first closely imbricating, 



[54] 



