Anacardium occidentale.

Botanical name: 

ANACARDIUM OCCIDENTALE, L. Cachewnut. In Florida, and spread to Brazil. Very valuable tree, it grows in pure sand and consolidates the same. Wood very fine and hard. The nut good and healthy; the cover of it produces a black exsudation, dies black, and is used to cure the itch and diseases of the skin. Ought to be cultivated.

Medical Flora, or Manual of the Medical Botany of the United States of North America, Vol. 2, 1830, was written by C. S. Rafinesque.