Figure 1

Aristolochia plant and herbal products. (A) Aristolochia plant; 1: heart-shaped leaf, 2: flower, 3: infructescence, 4: dry pods, (B) traditional herbal products; 1: Krai-Krue crude drug, 2: capsules of polyherbal formula, 3: herbal pills. Figure 1A courtesy of Assist. Prof. Aekkhaluck Intharuksa.