relax the uterus and therefore probably prevent miscarriage; however, the salicin may be teratogenic. Consequently, pregnant women should not use black haw in the first two trimesters. Furthermore, anyone using herbs for medical reasons should only use them under the supervision of a qualified medical professional. Black haw is not on the "generally recognized as safe list" of the U.S. Food and Drug Administration (FDA). References External links Flora of Pennsylvania prunifolium Flora of the North-Central United States Trees of the Northeastern United States Trees of the Southeastern United States Plants described in 1753 Plants used in traditional Native American medicine Plants used in Native American cuisine Taxa named by Carl Linnaeus