Epiphytic plant,rhizome rigid,dark gray,1.5—2mm thick.Pseudo bulbs broadly-ovate to sub-spherical,7-10 mm across,green with purple-browen tint.

Leaves rigid,coriaceous,oblong-lanceolate,slightly unequally bilobed at apex,3—5 cm long,and 0.5-0.9cm wide.

Inflorescence arising from the base of pseudobulb,sub-dense raceme 4—6 cm long,commonly with 15—22 flowers,covered with 3—6 black close narrow sheaths.Floral bracts yellowish,narrowly-cuneate,acute,4—6 mm long,less than 1 mm wide.Pedicel and ovary sub-erect,dark-violet,5—6.5mm long,0.5-1 mm wide.Flowers not resupinate,widely opening,with light unpleasant smell.Sepals dark violet to nearly black,straight,rigid.Dorsal sepal narrowly-ovate,bilobed at apex,5—6 mm long,2.5—3.5 mm wide,with 3 distinct nerves.Lateral sepals free,narrowly-obovate,obtuse,5—6 mm long,2—2.5 mm wide,with 1 nerve.Petals obovate to broadly-obovate,broadly-obtuse and ret use at apex,2.6-3 mm long,2.2—2.6 mm wide,with 1 nerve.Lip dark violet with dull greenish-violet center,fleshy,ovate triangular,5—6 mm long,3—4 mm wide,indistinctly trilobe,with small bifid callus at the base,finely warty along mid-vein;median lobe oblong,sometimes shortly emarginated at apex,side lobes broadly-trangular with obtuse to roundish apex.Column dark to light violet,fleshy,shortly-cylindrical,with very short column foot and persistent,immobile operculum.Pollinia 4,solid,yellow,pyriform to nearly spherical,terminated with large hemispheric viscidium.Flowering time:March-April.

fruit: