Habit: epiphytic herbs
Rhizome: retrose or transverse or creeping or ascending
Leaf: position: in two rows
Floral bract: small
Scape: emerging from center of leaves or pseudobulb base or rhizome
Sepal: free or similar
Petal: free, narrower than sepals or as long as dorsal sepal
Labellum: 3-lobed, 2-lobed
Stigma: concave
Pollinia: number: 4
Pollinia: other characteristics: without caudicle
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