Data Views Total Plants: 1 CSV Excel PDF Click on column headings to sort table by that column Plant Part Low PPM High PPM StdDev *Reference Allium cepa Bulb -- -- Tissut, M., Ravanel, P. 1980. Assessment of Flavonols in Adult Leaves of Several Vegetative Vacuoles. Phytochemistry, 19: 2077-2081. *Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.