注：名称已修订，正名是：孔唇兰 Herminium biporosum

 Porolabium biporosum (Maximowicz) Tang & F. T. Wang, Bull. Fan Mem. Inst. Biol. Bot. 10: 38. 1940.孔唇兰 kong chun lan

Herminium biporosum Maximowicz, Bull. Acad. Imp. Sci. Saint-Pétersbourg 31: 106. 1887; Monorchis biporosa (Maximowicz) O. Schwarz.

Plants 10-12 cm tall. Tubers globose, ca. 1 cm in diam., fleshy, unlobed. Stem slender, with 2 or 3 tubular sheaths and 1 leaf. Leaf linear-lanceolate, ca. 7 × 0.8 cm, base amplexicaul, apex obtuse. Inflorescence 6-8-flowered; floral bracts small. Flowers yellowish green or greenish, small; ovary twisted, fusiform, including pedicel 5-6 mm. Dorsal sepal forming a hood with petals, ca. 2.5 × 1.5 mm, 1-veined; lateral sepals ca. 3 × 1.5 mm, 1-veined. Petals ca. 2 × 1 mm, 1-veined; lip spreading, ca. 2.8 × 1.5 mm, base dilated and with 2 concave glands, attenuate toward apex. Column short, with 2 lateral appendages at base of anther; anther cucullate, large, 2-locular; pollinia 2, each attached to a viscidium by a short caudicle; rostellum deltoid, very large, with spreading lateral lobes; stigma cushionlike. Fl. Jul.

● Montane grasslands and lakesides; 3000-3300 m. E Qinghai, NE Shanxi.