apice obtuso apiculatum. Sepala lateralia oblique ellip- . 
tico-ovata, acuta, dorso cum carina conspicua denticulata. 
Petala oblique spathulato-oblanceolata, acuta. Labellum 
columnae valde adnatum: lamina suborbiculari-cordata, 
apice retusa, basi valde cordata, multivenosa, obtuse tri- 
carinata cum carinis lateralibus brevibus et carina media 
longa supra sensim dilatata. Columna magna, generis. 
Plant epiphytic, erect-ascending, branched, large, 45 
em. tall. Stem terete, wiry, about 5 mm. in diameter, 
concealed by the imbricated scarious leaf-sheaths. Leaves 
two, at the summit of the main stem and branches, sub- 
opposite, oblong-elliptic, obtuse to subacute, articulate 
with the leaf-sheaths, 8-11.5 cm. long, 2—-2.5 cm. wide, 
each pair of leaves subtended by two scarious sheaths, 
the upper sheath long-acuminate. Inflorescence a simple 
raceme at the apex of the main stem and branches, from 
between the two leaves; raceme recurved-pendent, 12.5 
em. long including the short peduncle, 6 cm. in diameter. 
Floral bracts linear-lanceolate, acuminate, scarious, up to 
2.3cm. long. Flowers rather large, fleshy-thickened, with 
slender pedicellate ovaries which are about 2 cm. long. 
Sepals and petals cream-color or light tan. Dorsal sepal 
oblong-oblanceolate or occasionally oblong-elliptic, nar- 
rowly obtuse-apiculate at the apex, 1.7 cm. long, 6 mm. 
wide. Lateral sepals oblique, ovate-elliptic or occasion- 
ally oblong-elliptic, acute, prominently keeled along the 
back with the keel excurrent and toothed along the mar- 
gin, 1.8 cm. long, 6.5 mm. wide. Petals oblique, spat- 
ulate-oblanceolate, acute, minutely ciliate, 1.7 cm. long, 
5 mm. wide. Lip adnate to the column; lamina subor- 
bicular-cordate, retuse at the apex, strongly cordate at 
the base, waxy white, 1.5 em. long, 1.8 cm. wide; dise 
prominently veined, with three keels in the center, the 
lateral keels much thickened near the base of the lip and 
scarcely extending to the middle of the lip, the central 
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