AMBROSIA, L. Ragweed. The A. elatior and other species with jagged leaves bear that name, called also Carrot-weed, Conot-weed, Bastard Wormwood. Bad weeds in old fields, not eaten by cattle; if cows eat it by chance, their milk becomes bitter: the plant deemed emollient and antiseptic in fermentations, the seeds mixed with wheat, give a bad bitter taste to bread. The A. trifida is called Horseweed and Wild Hemp, was used by the Indians to make a kind of hemp and ropes, may be available, sometimes 10 feet high.

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