unicae, folium multo superantes, supra dense multiflorae. 
Flores secundi, aurei. Sepala similia, lineari-lanceolata, 
longe acuminata, tubulari-coneava, lateralia valde obli- 
qua, quam sepalum dorsale latiora. Petala multo minora, 
oblique oblonga, apice rotundata vel subtruncata. Label- 
lum petalis paulo majus, pandurato-oblongum, dimidio 
basali subelliptico cum carinis binis conspicuis percurso, 
dimidio apicali ovato-elliptico, exciso. Columna parva, 
gracilis, arcuata. 
Plant rather large, epiphytic, up to about 80 cm. or 
more tall. Roots fibrous, numerous, elongate, glabrous. 
Stems approximate, unifoliate, up to 15.8 em. long, pro- 
vided with three or four close, tubular sheaths of which 
the uppermost is separated and elongate. Leaf short- 
petioled, up to 10.2 cm. long; lamina oblong-elliptic, 
minutely apiculate at the obtuse apex, cuneate at the 
base, up to 9 cm. long and 2.5 cm. wide, coriaceous. In- 
florescences one or two, much surpassing the leaf, many- 
flowered, dense above, loose below, 17—-18.7 cm. long, 
erect or spreading, in the axil of a small conduplicate 
spathe up to 11 mm. long. Flowers secund, yellow, 
medium-sized, with spreading segments. Sepals similar, 
narrow, long-acuminate, tubular-concave. Dorsal sepal 
linear-lanceolate, about 12 mm. long and 2.8 mm. wide 
near the base when expanded. Lateral sepals lanceolate, 
very oblique below, about as long as the dorsal sepal, 2.9 
mm. wide, long-decurrent on the column-foot. Petals 
much smaller than the sepals, obliquely oblong, rounded 
or subtruncate at the apex, about 4.6 mm. long and 1.8 
mim. wide. Lip slightly larger than the petals, pandurate- 
oblong, abruptly recurved at the base, about 5.6 mm. 
long; basal half subelliptic, traversed by a pair of high 
fleshy keels; anterior half elliptic-ovate, bidentate at the 
apex, concave. Column small, slender, arcuate, extended 
into a long ligulate apical wing which is incurved at the 
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