Habit: epiphytic herbs

Tuber: present

Leaf: characteristics: 1, 2, several to many

Leaf: position: distichous

Leaf: shape: oblong

Inflorescence: position: terminal or subterminal

Inflorescence: other characteristics: branched, unbranched

Sepal: free or similar, lateral sepals adnate to column foot or labellum forming a mentum

Petal: similar to sepals, narrower than sepals or as long as dorsal sepal

Labellum: 3-lobed, not lobed

Column: with column foot

Pollinia: number: 4

Pollinia: other characteristics: with caudicle or viscidium, with stipe