ORCHIDACEiE 



median nerve between the carinae) ; the carinae, one on each lat- 

 eral nerve, reaching the base of the middle lobe, united at the base 

 by a transverse thickening. Gynostemium arched. Stelidia lat- 

 eral, triangular, falcate, acute, rising from about the middle of 

 the column, reaching about to the middle of the elongated acute 

 terminal tooth. (Plate 82.) 



KiNABALU, Clemens 202, November 1915. 5000-10,000 feet altitude. 



20. Dendrochilum quinquelobum Ames sp. nov. Pseudo- 

 bulbi aggregati, semifusiformes, monophylli. Folium lineari-lan- 

 ceolatum, subobtusum, breviter petiolatum. Pedunculus gracihs, 

 foliis longior. Racemus gracilis, multiflorus ; flores parvi. Brac- 

 teae patentes. Sepala lateralia ovato-oblonga, acuta. Sepalum 

 dorsale lanceolatum, acutum. Petala oblongo-lanceolata, acuta, 

 sepalis lateralibus angustiora. Labellum quinquelobatum; callus 

 hippocrepiformis in disco. Gynostemium gracile. Stelidia basi- 

 laria. Ala apicalis simplex. 



Pseud obulbs up to 4.5 cm. long, approximate, crowded, when 

 immature concealed by closely appressed brownish sheaths, semi- 

 fusiform, very slender, gradually attenuated, monophyllous. 

 Leaves 12-25 cm. long, 8-16 mm. wide, linear-lanceolate or ob- 

 long-lanceolate, petiolate, subacute. Petiole about 3 cm. long. 

 Peduncle ±2 dm. long, longer than the leaf, slender, naked. Ra- 

 ceme slender, about 16 cm. long, about 5 mm. in diameter, many- 

 flowered. Flowers small, yellow, about 3 mm. apart. Bracts 

 2.5 mm. long, spreading, for the most part simply sheathing the 

 base of the pedicels, lanceolate, acute, equaling the pedicellate 

 ovary. Lateml sepals 3 mm. long, 1 mm. wide, ovate-oblong, acute. 

 Dorsal sepal 3 mm. long, concave, lanceolate, acute. Petals 

 2.5 mm. long, oblong-lanceolate, acute, slightly more than one- 

 half as wide as the lateral sepals. Labellum five-lobed, 2.5 mm. 



long; basal lobes minute, triangular, obtuse, erect; the lateral of 



[63] 



