Data Views Total Plants: 3 CSV Excel PDF Click on column headings to sort table by that column Plant Part All Essential Oil Leaf Essent. Oil Plant Low PPM High PPM StdDev *Reference Aspalathus linearis Leaf Essent. Oil -- 1600.0 * Artemisia capillaris Essential Oil -- -- * Rubus idaeus Plant -- -- * *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.