Medicinal source:

Fátima Agra, M., França de Freitas, P. & Barbosa-Filho, J.M. (2007). Synopsis of the Plants Known as Medicinal and Poisonous in Northeast of Brazil. Revista Brasileira de Farmacognosia. 17 (1): 114-140. [MPNS is grateful to Uwe Schippmann (MAPROW) for providing the data from this reference.]