狭瓣组 xia ban 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, thick. Inflorescence solitary, arising near pseudobulbs, an elongate raceme. Pedicel with basal node well above attachment of subtending bract. Sepals free, margins glabrous, adaxially glabrous, 3-veined. Petals: margins erose, 1-veined; lip: margins without auricles or lateral lobes, margins glabrous, adaxially glabrous. Column: stigma not protruding at its base, foot distinctly elongated so as to leave a gap between lower margin of petal and upper of lateral sepal; anther: front margin not projecting, abaxially with a rounded crest; pollinia 4, inner more than 1/2 as long as outer, all without appendages.

Ten accepted species: Himalayas to the Philippines, Sulawesi, and New Guinea; one species in China.

See the revision by Vermeulen (Gard. Bull. Singapore 54: 26. 2002).