- Alstonia, genus Alstonia - genus of evergreen trees or shrubs with white funnel-shaped flowers and milky sap; tropical Africa to southeastern Asia and Polynesia
--1 is a kind of dicot genus, magnoliopsid genus
--1 is a member of Apocynaceae, family Apocynaceae, dogbane family
--1 has members: dita, dita bark, devil tree, Alstonia scholaris