Data Views Total Plants: 23 CSV Excel PDF , Previous12 Show all rows. Paginate rows. Click on column headings to sort table by that column Plant Part All Essential Oil Flower Fruit Fruit Essent. Oil Fruit Juice Husk Essent. Oil Leaf Leaf Essent. Oil Plant Seed Shoot Silk Essent. Oil Silk Stigma Style Low PPM High PPM StdDev *Reference Zea mays Silk Stigma Style -- -- * Zea mays Leaf -- -- * Zea mays Silk Essent. Oil -- 5000.0 * *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.