Thelasis Blume
Stem: sheathing above middle
Leaf: characteristics: 1, 2
Leaf: position: in two rows
Inflorescence: type: raceme, spikelike
Scape: arising laterally on pseudobulb or base of short stem or nodes of rhizome
Sepal: free or similar
Petal: narrower than sepals or as long as dorsal sepal
Labellum: not lobed
Column: without column foot
Rostellum: 2-lobed or beaked
Pollinia: number: 8
Pollinia: other characteristics: with caudicle or viscidium
Fruit:type: capsule