Data Views Total Plants: 2 CSV Excel PDF Click on column headings to sort table by that column Plant Part All Fruit Leaf Essent. Oil Low PPM High PPM StdDev *Reference Aspalathus linearis Leaf Essent. Oil -- 1300.0 * Carica papaya Fruit -- -- Jim Duke's personal files. *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.