Medicinal source:

Padua, L.S. de, Bunyapraphatsara, N. & Lemmens, R.H.M.J. (eds.) (1999). Medicinal and Poisonous Plants 1. Backhuys, Leiden (Plants Resources of South-East Asia 12 (1)). [MPNS is grateful to Uwe Schippmann (MAPROW) for providing the data from this reference.]