Stem : epiphytic, stem erect, stout, sheathed by leaf sheath.

 Leaves thick leathery hard, two-row opposite, flat, lower often V-shaped folded, narrowly oblong, ca. 6-13.6 cm long, ca. 0.8-1.5 mm wide, apex slightly acute and with irregular 4 short teeth.

Inflorescences erect or slightly curved, noded, longer than leaves, often 2-4, racemes axillary and dense majority of flowers ; bracts are small, ovate triangular, about 3 mm long, apex acuminate ; pedicels and ovaries pale lemon yellow, ca. 1-1.3 cm long ; flowers yellowish green when bud, lemon yellow after bloom ; sepals and petals are similar, wide ovate, about 6-8mm long, about 4mm wide, apex slightly blunt, entire ; 3 cleft lip ; lateral lobes orange yellow, erect, about 2 mm long, nearly triangular, apex acute or slightly blunt ; the middle lobe is nearly elliptical, about 4 mm long and 2 mm wide. The apex is slightly obliquely truncated, with an orange corpus callosum on both sides of the base ( at the distance from the mouth ). It is pale yellow, cylindrical and slightly flat, about 4-6mm long, parallel to the middle lobe, and the end is round ; stamens short, about 2 mm long, cap purple brown, the front end slightly narrow, blunt and tilted tip ; pollen pale yellow. 

Flowering : May - June.