Epiphytic herbs. Pseudobulbs dwarf, subconic or cylindric, tapering, 4-9.5 cm. long and 2.5-4 cm. wide. Leaves plicate, distichous, elliptic-lanceolate, acute or acuminate, the imbricating persistent bases enveloping the pseudobulbs, the old growth armed at the apex with sharp spines, the leaf blades deciduous at the end of the growing season. Flowers unisexual, dimorphic, produced on separate scapes. Staminate inflorescences arching or pendent racemes 8-15 cm. long, from the base of the pseudobulbs. Sepals subequal, free, lanceolate, acumi-nate, brownish green, purplish, flesh-pink or dark reddish brown, 2.5-4 cm. long and 2.8-3.2 mm. wide, dorsal sepal erect, laterals strongly reflexed or spread-ing, often more or less parallel with the elongate peduncle. Petals subequal to the sepals, elliptic-lanceolate, acute, pale green, purplish green, or flesh-pink, spotted red-brown, 2.5-3 cm. long and 4-5 mm. wide, erect and closely approximating the dorsal sepal, the three segments closely arching over the column. Lip short, the base saccate, the apex complexly 3-lobed; lateral lobes erect, 2 on each side, about equaling the saccate base in length, the upper pair linguiform, obtuse, the lower pair linear-lanceolate, acuminate; mid-lobe triangular, spreading, the entire lip including lobes 5-10 mm. long, white or pale yellow, the margins of the central lobe red-brown, the lateral lobes and inner surface of the saccate base also irregu-larly blotched red-brown. Column slender, erect, conspicuously rostrate at the apex, winged, 12-15 mm. long and about 4 mm. broad, under-surface with 2 elongate antennae, the points of which extend to the inner base of the saccate lip. Pistillate flowers relatively rare, produced on few-flowered, erect racemes 8-10 cm. tall, from the base of the pseudobulbs. Sepals free, subequal, spreading or reflexed, coriaceous, elliptic-lanceolate, acute, pale green, 2 cm. long and 4-6 mm. wide. Petals subequal to the sepals, spreading, coriaceous, elliptic-lanceolate, with oblique acute tips, green, minutely spotted red-brown, 2-2.3 cm. long and .6-.7 cm. wide. Lip fleshy, calceiform, yellowish green, 18-20 mm. long and 15 mm. wide, with an acute, thickened, broadly triangular apex. Column short, stout, broadly triangular in cross-section, 8 mm. long and 7 mm. wide, with a narrow, lunate functional stigmatic surface.
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