ORCHIDACE^ 



angustata, coriacea, supra nitentia, subtus nervis conspicuis quin- 

 que ornata. Inflorescentia hysterantha. Pedunculus usque ad in- 

 florescentiam valde compressus, anguste alatus, rigidus, nitens. 

 Rachis subflexuosa, internodiis floralibus perbrevibus irregulari- 

 bus. Bracteae plerumque deciduae, sed in summa rachidis per- 

 paucae,erectae, imbricatae manent.Flos in sicco membranaceus. 

 Sepala lateralia anguste lanceolata, acuminata, cymbiformia, mu- 

 cronata, basi gibboso-saccata, carinata. Sepalum dorsale simile, 

 paulo brevius atque latius. Petala anguste linearia, apice obli- 

 quissime bidentata. Labellum trilobatum, in circuitu ovato-ob- 

 longum ; lobi laterales erecti, oblongo-semiorbiculares ; lobus me- 

 dius ex ungue lato in laminam suborbicularem subito dilatatus, 

 marginibus undulatis; carinae tres e basi exoriuntur, quorum 

 laterales ad medium lobi medii extendunt; carina media humi- 

 lior ad basim lobi medii decurrit, e quo linea crassa per lobum 

 medium ad apicem extendit. Gynostemium arcuatum, in parte 

 superiore praesertim late alatum. Clinandrium conspicuum, 

 ovato-triangulare. Rostellum parvum, leviter retusum. 



Rhizome thick, woody. Pseudobulbs about Q.5 cm. long, 

 1.1 cm. broad below, fusiform or narrowly cylindric, diphyllous, 

 dull, yellow-green in dried specimens. Leaves very variable in 

 size, about 20 cm. long, 2.5 cm. wide, rising suboppositely from 

 the summit of the pseudobulb, linear-oblong, gently narrowed to 

 each end, acute, mucronate from the extended mid-vein, below 

 complicate-narrowed into a petiole, coriaceous, shining above, 

 dull beneath, with five nerves, especially the mid-nerve, prom- 

 inent beneath. Petiole 3-4 cm. long, winged. Inflorescence hys- 

 teranthous. Peduncle up to the raceme about 20.5 cm. long, 

 4 mm. wide, strongly laterally flattened and narrowly winged, 

 rigid, shining, yellow. Rachis about 6.5 cm. long, sUghtly flex- 

 uous, strongly zigzag, angled, thicker, narrower, and less com- 



[26] 



