瘦轴组 shou zhou zu

Roots smooth. Stem erect or pendulous, tall, slender or slightly swollen, leafy, semideciduous, sometimes growing for 2 years. Inflorescences lateral, short, often distal, pendulous, borne on bare penultimate leads, few flowered, flowers sometimes clustered; peduncle and rachis thin and rigid. Flowers small, pink, white, or brownish. Mentum saccate, with an expanded cavity. Lip concave, cymbiform, entire, interior often shortly hairy.

About seven species: Himalayas, some species extending through Indochina and Malaysia to the Philippines; two species in China.