What is "priogymnanthus"

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.

• Priogymnanthus apertus (B.Ståhl) P.S.Green - Ecuador
• Priogymnanthus hasslerianus (Chodat) P.S.Green - Bolivia, Brazil, Paraguay, Argentina