Papilionanthe subulata (Willd.) Garay from Borneo, Cambodia, Malaya, Thailand is a synonym of Thrixspermum filiforme
Papilionanthe taiwaniana (S.S.Ying) Ormerod was formerly included as a species of the genus, but has since been re-classified as a hybrid of Papilionanthe teres and Luisia megasepala. It has been transferred to the nothogenus × Papilisia as × Papilisia taiwaniana (S.S.Ying) J.M.H.Shaw.[5]Papilionanthe teres is not native to Taiwan, but has been introduced to the island. The other parent species Luisia megasepala is an endemic Taiwanese species.[6][7]