Fagopyrum cymosum, also known as perennial buckwheat or tall buckwheat', is a domesticated plant used in traditional Chinese medicine, for animal feed, and as an ornamental plant. It is native to much of China, and to Bhutan, Nepal, India, Burma, and Vietnam.
Chemistry The flowers are known for their high content of fagopyrin, a naphthodianthrone that provokes phototoxic effects known as fagopyrism.
See also シャクチリソバ
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