Found in cavities in the trunk of Andira araroba, Aguiar (Vouacapoua araroba [Aguiar] Lyons), Leguminosae and freed as much as possible from fragments of wood. Habit. In damp forests of Brazil and Bahia. Constit. About 50% chrysarobin; chrysophanic acid, gum, about 2% resin, ararobinol—said to be the methyl ether of emodin.
Dermatologic.