Stem : stem cylindrical or round, with many nodes ; stem enveloped by persistent white membranous sheaths or leaf sheath residue torn fibrous.

Leaves : Leaves alternate in two rows, thin leathery, long lanceolate, about 4.5-8cm in length, 0.7-0.9mm in width, slightly unequally dichotomous at the apex, narrowly constricted at the base and sheathed as a stalk, sheathed near white and with many veins.

Flowers : Racemes are pulled out from nodes near upper stem ; with 1-3 flowers, peduncle about 3 mm long, base with 2 dry membranous sheath wrapped ; the bracts are nearly ovate, apex acute or acuminate, about 6-9mm long and 2-4mm wide. Flowers white lips with purple spots, flower diameter of about 3-4cm, fragrant ; the middle sepals are nearly oval, the apex is nearly sharp or obtuse, about 2.2 cm long and about 6 mm wide. The petals are nearly long round lanceolate, and a few petals are concave near the top of the edge. The apex is nearly sharp or round, about 2.2-2.4 cm long and about 8-9 mm wide. Lateral sepals nearly oval, apex acute, about 2.2-2.5cm long, about 5-6mm wide, the base of the synthesis of calyx sac ; the lip is nearly oblong, with fine serrated or microwave-shaped edges, about 2.6 cm in length. The apex is slightly curved downward. The front is densely covered with short villi, and the back is smooth. It is narrowed below the middle and holds the stamen column or semi-holds the stamen column. The base has claws, and a ridge above the base extends to the lip disc. There are purple stripes on both sides, and the lip disc has purple plaques. Stamen column white, cap white and with two purple spots ; pilose foot purple, base sunken into a small hole. 

Flowering : May - June.

Fruit :