Carica papaya.

Botanical name: 

CARICA PAPAYA, L. Papay. Wild in Florida, fine evergreen tropical tree: fruit like a pear, good to eat: milk of the unripe fruit a fine vermifuge, one dose is said to kill all worms, and even the tapeworm, a dose of castor oil is taken next to expel them.

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