Erect epiphytic herbs, the plants nearly identical with those of Stanhopea graveolens. Pseudobulbs short, ovoid, the apex with a single broad plicate, petiolate leaf. Flowers relatively large, on short or somewhat elongate, pendent racemes from the base of the pseudobulbs. Sepals membranaceous, concave, pale yellow dotted brownish purple, the dorsal sepal free, erect, elliptic-lanceolate, acute or apiculate, 4.5-6 cm. long and 1.5-2.5 cm. wide, laterals somewhat connate at the base, reflexed, elliptic-lanceolate, acute, 4.5-6 cm. long and 2-3 cm. wide. Petals pale yellow, dotted brownish purple, reflexed, with undulate margins, lanceolate-acuminate, 4-5 cm. long and .8-1.5 cm. wide. Lip very fleshy, complexly 3-parted, 4.5-5 cm. long; the hypochile inflated, subsaccate, inserted on the base of the column, with 2 large, lateral, purple-brown spots, in profile geniculate or subgeniculate, with (in fresh material) a deeply emarginate, central constriction (in fresh material somewhat longer than broad, in dried material about twice as long as broad), with a more or less pronounced gibbose swelling about the middle of the lower surface; the lateral margins with falcate, acuminate thickenings the bases of which, above the basal concavity, are produced into two short, broad, rather obscure teeth; mesochile short, pale yellow, inserted on the apex of the hypochile, with 2 elongate, acuminate, incurved, falcate horns; epichile pale yellow, articulated to the apex of the mesochile, ovate, acute, concave, with somewhat reflexed margins. Column somewhat arcuate, subterete below, broadly winged above, 4-4.5 cm. long.
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