Erect or pendent epiphytic herbs up to about 40 cm. long, usually less; flowers often showy. Stems or pseudobulbs 2-12 cm. long, cylindric, slender, 0.2-0.5 cm. in diameter, usually covered with a pergameneous sheath, 1-leaved. Leaves 6-23 cm. long and 0.3-2.5 cm. broad, either terete or flattened, if flattened then usually linear-elliptic, acute. Inflorescence borne at the end of the stem, either shorter or longer than the subtending leaf, few-to several-flowered. Sepals 4-9 cm. long and 0.2-0.4 cm. broad, linear, acute. Petals 4-9 cm. long, 0.05-0.2 cm. broad, filiform. to linear, acute. Lip 4.5-8 cm. long and 2.5-4 cm. broad; base unguicu-late and cucullate, enfolding the column; anterior portion broad, cordate to orbicular-cordate, acuminate or at least apiculate, having several prominent veins.
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