Data Views Total Plants: 3 CSV Excel PDF Click on column headings to sort table by that column Plant Part Low PPM High PPM StdDev *Reference Thymus vulgaris Plant -- -- Chemical Constituents of Oriental Herbs (3 diff. books) Aloysia citrodora Plant -- -- * Scutellaria galericulata Plant -- -- Abstract (See species file) *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.