Alstonia is the widespread, largest genus of evergreen trees trees. The inflorescence is consisting of terminal, axillary thyrsiform cymes. The corolla lobes overlapping to the left, the right. The plants contain a milky latex in rich, poisonous alkaloid s. Alstonia trees are used in traditional medicine, are endangered in the widespread. Alstonia species are commercial timbers called pule pulai.
Widespread, largest genus of evergreen trees trees, Only species, Commercial timbers called pule pulai