Medicinal source:

Fátima Agra, M., Nurit Silva, K., Lima Diniz Basilio, I.J., França de Freitas, P. & Barbosa-Filho, J.M. (2008). Survey of Medicinal Plants used in the Region Northeast of Brazil. Revista Brasileira de Farmacognosia. 18 (3): 472-508. [MPNS is grateful to Uwe Schippmann (MAPROW) for providing the data from this reference.]