Terrestrial herbs, up to about 1 m. tall. Leaves basal, long-petiolate, large, membranaceous, suberect; petiole up to about 25 cm. long, slender; lamina 8-22 cm. long and 3-16 cm. broad (those of Panamanian specimens large), elliptic or elliptic-oval to broadly oval, acute, acuminate or obtuse, margin often sphacelate. Inflorescence a densely flowered spike up to about 30 cm. long. Sepals 3-5 mm. long and 0.75-1.25 mm. broad, linear-oblong, obtuse, 1-nerved, strongly coiled, connate at their bases into a short tube. Petals 3-5 mm. long and 0.2-0.5 mm. broad, linear, obtuse, 1-nerved. Lip 4-6 mm. long, strongly concave or calcei-form, short-unguiculate, with a lateral callus on either side at the base, glabrous. Column about 2 mm. long.
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