Carthamus tinctorius.

Botanical name: 

CARTHAMUS TINCTORIUS, L. Bastard Saffron. Cultivated, become spontaneous. Flowers and seeds nauseous, bitter and aromatic, laxative, diaphoretic and diuretic, useful in jaundice, cough, asthma, dropsy, measles, exanthema, &c. in infusion. The seeds produce oil suitable for burning. Flowers chiefly used to die yellow and make the Ladies' rouge. Often imposed upon as the true Saffron or Crocus, which has other 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.