Description: Epiphytic herbs, monopodial; vegetative stems vestigial; roots creeping over the surface of the substrate [or aerial], fibrous.
Leaves scale-like, imbricate, brown.
Inflorescence racemose, several-flowered, lateral; flowers resupinate. Sepals free, similar. Lateral petals free, slightly shorter than sepals. Labellum free, attached at base of column; lamina unlobed [or 3-lobed], with a prominent, backward-pointing spur and an incurved, filiform, apical appendage, otherwise unornamented. Column lacking free filament and style; column wings fused to column, expansive in upper half as ear-like lobes [or apparently absent]. Column foot absent. Anther incumbent, cap-like. Pollinia 4, waxy. Stigma entire. Rostellum obscure, ventral.
Distribution and occurrence: World: c. 170 species, southern & eastern Asia, Malesia, Melanesia, Polynesia & Australia. Australia: 5 species (3 species endemic), Qld, N.S.W.
Text by P. H. Weston