Scapes from middle of leaf cluster, 1-2, erect, 30-50 cm long, outside upper leaf layer, densely covered with short hairs, below inflorescence with 1 tubular sheath clinging to inflorescence stem and several sterile lanceolate bracts ; the raceme is about 10 cm long, sparse about 10 flowers ; bracts persistent, herbaceous, narrowly lanceolate, 1-1.8 cm long, base 2-3 mm wide, apex acuminate, glabrous ; pedicel and ovary ca. 2 cm long, curved, densely short hairy, ovary clavate ; the back of sepals and petals is yellow-green, inside is reddish-brown, glabrous ; middle sepals narrowly lanceolate, 1.7-2.2 cm long, 4 mm wide above the base, apex acuminate, with 5 veins ; lateral sepals obliquely lanceolate, as large as middle sepals, apex acuminate, with 5 veins ; petals linear, nearly as long as sepals, 2-3 mm wide, apex acuminate, with 3 veins, only midvein reaches apex ; the lip is white with purple apex, and then turns yellow. The base is connate with the whole stamen column wing, 11-18mm long, 3-lobed. Lateral lobes obliquely ovate triangular or suborbicular, the distance between the apexes of both lobes is about 7 mm, the apex is acute or acute, and the front edge is sometimes dentate ; the middle lobes are elliptic, 8-10 mm long and 6-7 mm wide. The apex is acutely pointed and awn-like, and the base is wedge-shaped or narrowed into claws. The margin is wavy and has irregular teeth, glabrous or sparsely hairy ; lips with 3-5 keel ridges ; cylindrical, small, about 5 mm long, blunt end, glabrous or sparsely hairy ; stamens stout, 4-5 mm long, upper part enlarged, glabrous or sometimes sparsely hairy ;Pistil wings enlarged at the upper end to form a triangle and enclose the stigma, and the lower end extends to the base of the lip. Stamen beak 2 split ; lobes subulate, ca. 1.2 mm long ; the anther is small, the medicine cap is narrow at the front end, the tip is upturned ; pollen mass slightly flattened narrowly ovoid, equal in size, 1. 2 mm long ; sticky disk small, nearly oblong. The capsule is nearly elliptic, 2 cm long and 8 mm thick. Flowering May-September.