柱唇组 zhu chun zu

Rhizome creeping; roots sprouting mainly below pseudobulbs, spreading; new shoots arising from basal node of pseudobulb. Pseudobulbs distinct, apex with 1 leaf. Leaves persistent, thin to thick. Inflorescences arising near pseudobulbs, solitary or a few together on a lateral sympodium, 1-flowered. Pedicel with basal node more than 1 × diam. of pedicel above attachment of subtending bract. Sepals free, ± equally long, margins glabrous, 3-veined. Petals: margins ± glabrous, 1-veined; lip: margins without auricles or lateral lobes, margins glandular-papillose, adaxially glandular papillose. Column: stigma not protruding at its base, foot absent or very short; anther: front margin projecting into a triangular beak, abaxially with a slight, rounded crest; pollinia 4, inner more than 1/2 as long as outer, all without appendages.

Twenty-nine provisionally accepted species: Indochina to W Pacific; one species (endemic) in China.