No, according to Dr. Chun Yu's information, the medicinal value of Zizania latifolia is to clear away heat and toxic materials, relieve polydipsia and facilitate defecation. Poor cooking is not toxic, but don't eat too much to avoid bloating. Zizania latifolia, the name of Chinese herbal medicine, is a spindle-shaped mast fungus gall stimulated by Zizania latifolia black powder.