Achras sapota.

Botanical name: 
Manilkara zapota

ACHRAS SAPOTA, L. Sapotil. Florida and Bahama. Fine fruit. Seeds acrid diuretic, useful in emulsion for nephritis, dysury, and diseases of the urethra.

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