Terrestrial herbs with distinct creeping rhizomes and pseudobulbous stems. Pseudobulbs narrow, arising from rhizome, 1-leaved at apex. Leaves petioled, oblong or lanceolate, plicate. Peduncle lateral, producing from rhizomes, long, erect, with few sheaths. Flowers in loose racemes; sepals subequal, lateral ones connate at base into short mentum with foot of column and lip-base; petals similar to sepals but slightly oblique; lip erect, hinged to foot of column, broadly 3-lobed and sometimes with an auricled base, disc often 3-keeled; column incurved, 2-auricled at middle, base often with 2 vertical ridges on ventral side above opening of mentum, producing below into short saccate foot; anther terminal, incumbent, 2-celled; pollinia 2, waxy, without caudicles, free or connected by diffuse viscid material, stigma entire; rostellum short and borad, undivided.
About 6 species, from China, India, Sri Lanka, through Malaysia to Java, Borneo, Sulawesi and Fiji Islands. One species in Taiwan.