Folia oblonga vel ligulata, apice bilobulato rotundato- 
obtusa, sessilia vel breviter petiolata. Inflorescentiae 
breves, uniflorae, in caulinarum vaginarum axillis. Flores 
parvi, aurei. Sepalum dorsale ovato-oblongum, subacu- 
tum, concavum. Sepala lateralia oblonga vel ovato- 
oblonga, subacuta, paulo minora. Petala ovato-oblonga, 
obliqua, apice late rotundata. Labellum ovato-oblongum, 
apice rotundatum vel truncatum, basi rotundatum, super 
medium leviter angustatum cum lateribus erectis; discus 
medio conspicue callosus. Columna perbrevis, in pedem 
brevem extensa. 
Plant large, growing on rocks. Stems elongate, bear- 
ing distant pseudobulbs, entirely concealed by a series of 
distichous sheaths which are densely imbricated, condu- 
plicate, and become gradually larger upward and articu- 
lated to small immature leaf-blades. Pseudobulbs com- 
planate-cylindric, somewhat clavate in the dried speci- 
men, bifoliate, 4.5-6 cm. long, finely multistriate when 
dry, partially concealed on each side by one or more con- 
duplicate sheaths the uppermost of which bear condupli- 
cate blades. Leaves oblong to ligulate, the larger ones 
sessile to distinctly petioled; lamina obtuse to rounded 
and more or less unequally bilobed at the apex, some- 
what narrowed below, subcoriaceous, 18-26 em. long, 
up to 2.9 em. wide, with the mid-nerve rather conspic- 
uous beneath; petiole (if present) up to 4.5 em. long, 
slender, channelled. Inflorescences numerous, short, 
erect, 1-flowered, in the axils of the cauline sheaths; pe- 
duncle about 2.5 em. long, appressed, entirely covered 
by several scarious imbricating sheaths, wholly or mostly 
hidden by the stout imbricating conduplicate cauline 
sheaths ; pedicellate ovary prominently exserted, slender- 
cylindric, plurisuleate in the dried specimen, about 3.5 
cm. long, surrounded at the base by an appressed in- 
fundibuliform scarious sheath about 1.5 em. long. Flow- 
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