Bunias americana.

Botanical name: 

BUNIAS AMERICANA, Raf. Seacole. The B. cakile, of Schoepf, B. maritima of others. On the sea shores. Acrid, diuretic, antiscorbutic. Edible, makes a fine pickle for scurvy; root mixed with bread in Canada.

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