Priogymnanthus is a genus of two species of flowering plants in the family Oleaceae native to tropical South America, in Bolivia, Brazil, Ecuador, Argentina and Paraguay. They are deciduous or semi-deciduous trees, closely related to Chionanthus. Species \n* Priogymnanthus apertus (B.Ståhl) P.S.Green - Ecuador \n* Priogymnanthus hasslerianus (Chodat) P.S.Green - Bolivia, Brazil, Paraguay, Argentina