Baccharis halimifolia.

Botanical name: 

BACCHARIS HALIMIFOLIA, L. Groundsel tree. Pencil tree. Sea shore, from Long Island to Florida. Ornamental when in seed. Peculiar scent like Conyza and Jacobea, indicating medical properties.

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