Apigenin, found in parsley and celery, as the glucoside apiin,
Campferol, found in Java indigo, as the glucoside campferitrin,
Fisetin, found in quebracho wood and fiset wood,
Quercitrin, found in oak bark, horse-chestnut flowers, and in the skin of onions,
Morin, found in yellow wood (Morus tinctoria).