Species found on Ankarana include Pachypodium decaryi, Adenia neohumbertii (family Passifloraceae) and several species of Euphorbia: E. ankarensis, E. pachypodiodes, and E. neohumbertii var. neohumbertii.    From Wordnik.com.  [Madagascar dry deciduous forests] Reference

Adenia gummifera Harv of the family Passifloraceae is a distinctive woody climber whose infusions are used as emetics and are said to help with some forms of depression.    From Wordnik.com.  [BioMed Central - Latest articles] Reference

(Passifloraceae).    From Wordnik.com.  [Chapter 7] Reference