58, 4 Ames and Quisumbing: Philippine Orchids, VI G 
internodia 2 ad 3 cm longa. Folia disticha, patentia, ligulata, 
subcoriacea, 10.5 ad 17.5 cm longa, 1.1 ad 1.6 cm lata, apice valde 
bilobata, lobis inaequilateralibus. Inflorescentia terminalis, 4 
ad 6 cm longa, simplex, fere sessilis; bracteae distichae, rigidae, 
imbricantes, cymbiformes, acutae, 6 ad 8 mm longae. Flores 
singuli apparentes, albi, odorati, 2.5 ad 2.6 cm longi, 2.2 ad 
2.4 em dimetiente. Pedicellus cum ovario gracilis, circiter 1.4 
em longus. Sepala lateralia lanceolata, paulo obliqua, carinata, 
acuta, circiter, 2.8 cm longa, 7 mm lata. Sepalum dorsale 
oblanceolato-oblongum, acutum, circiter 2.5 em longum, 7 mm 
latum. Petala anguste lanceolata vel anguste oblanceolata, 
obliqua, acuta, circiter 2.2 cm longa, 5.75 mm lata. Labellum in 
circuitu late oblongum, brevissime unguiculatum, supra medium 
trilobatum, circiter 1.7 cm longum et 9.5 mm latum; lobi laterales 
parvi, ovato-triangulares, obtusi, 2 ad 2.5 mm longi; lobus medius 
subquadratus, antice truncatus et minute apiculatus, 6 ad 6.5 
mm latus, medio calloso-elevato et flavo. Discus cum parte longi- 
tudinali centrali calloso-elevata pubescenti in callum distinctum 
terminanti. Columna crassiuscula, recta, vel paulo incurvata, 
antice excavata, circiter 14 mm longa. Clinandrium parvum; 
anthera late ovoidea, apice obtusa, margine anteriore profunde 
emarginato. Pollinia 2, triangulari-ovoidea, dorso excavata. 
Plants growing ascendingly on tree trunks. Roots fibrous, 
flexuous, stout, glabrous. Stems flattened, 26 to 54 cm long, 
arising from terete, branching rhizomes; internodes shortest at 
base, 2 to 3 cm long, entirely or almost entirely concealed by 
the flattened leaf-sheaths. Leaves distichous, ligulate, subco- 
riaceous when dry, 10.5 to 17.5 cm long, 1.1 to 1.6 cm wide, 
strongly bilobed at the apex with the lobes inequilateral. In- 
florescence terminal, simple, almost sessile, 4 to 6 cm long; 
bracts distichous, rigid, imbricated, cymbiform, acute, 6 to 8 
mm long. Flowers appear singly, rather fleshy, white, fragrant, 
2.5 to 2.6 em long, 2.2 to 2.4 cm across. Pedicellate ovary 
slender, about 1.4 cm long. Lateral sepals lanceolate, oblique, 
carinate near the apex, acute, about 2.3 cm long, 7 mm 
wide. Dorsal sepal oblanceolate-oblong, acute, about 2.5 cm 
long, 7 mm wide. Petals narrowly lanceolate or narrowly 
oblanceolate, oblique, acute, about 2.2 cm long, 5.75 mm wide. 
Labellum very slightly unguiculate, broadly oblong, trilobed in 
outline above the middle, about 1.7 cm long and 9.5 mm wide; 
lateral lobes very small, ovate-triangular, obtuse, 2 to 2.56 mm 
long; middle lobe subquadrate, truncate and minutely apiculate, 
6 to 6.5 mm wide, with the center callose-elevated and yellow. 
