Repent or caespitose epiphytic herbs up to about 5 dm. tall. Pseudobulbs 8-22 cm. long and 0.6-2.2 cm. in diameter, cylindric, fusiform or tapering to the base, 1-to 2 (-3)-leaved. Leaves 8-28 cm. long and 2-8 cm. broad, oblong-lainceolate, elliptic-oblong to oval, obtuse, coriaceous. Inflorescence a few-to several-flowered raceme; bracts 3.5-6.5 cm. long and 0.6-1.5 cm. broad, lanceolate to oblanceolate, cucullate, pergameneous. Sepals 35-85 mm. long and 1.5-6 mm. broad, linear to linear-lanceolate or linear-oblanceolate, acute or acuminate. Petals 35-70 mm. long and 1.5-5 mm. broad, linear-lanceolate to linear-oblanceolate, acute or acuminate. Lip 4-8 cm. long, 3-lobed, the base adnate to the column; lamina 3-6 mm. long, with 2 short lamellate calluses at the apex of the column; lateral lobes about 1.5-2.5 mm. long, each dssentially reniform in outline or obliquely lanceolate-ovate, deeply dentate or usually lacerate; mid-lobe linear-filiform, up to 6 cm. long. Column with the clinandrium dentate or sublacerate.
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