Caespitose, epiphytic plants up to about 5 dm. tall. Stems about 1-2 mm. in diameter, slender, bearing 1-3 leaves toward the apex, leafless below or the leaves reduced to sheaths. Leaves 13-18.5 cm. long and 1.8-2.5 cm. broad, elliptic-lanceolate to narrowly, elliptic, acuminate, plicate, with seven principal nerves, lepidote on the lower surface especially along the nerves at the base, glabrous above or essentially so; leaf-sheaths closely appressed to the stem, lepidote. Inflorescence terminal, 1-flowered; flowers small, white with a pale yellow lip. Dorsal sepal about 3.5 cm. long and 7 mm. broad, oblanceolate, apiculate, 7-nerved. Lateral sepals about 3.5 cm. long and 7 mm. broad, linear-oblong, apiculate, 7-nerved. Petals about 3.5 cm. long and 6-7 mm. broad, oblanceolate, acute, terminal half serrulate, 7-nerved. Lip about 3.5 cm. long and 1.8 cm. broad, oblong-oval, truncate or shallowly retuse, terminal half lacerate-dentate; disc with several inconspicuous longitudinal carinae and with a small bipartite callus thickening at the base, pubescent longitudinally along the middle, especially toward the apex.
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