Data Views Total Plants: 61 CSV Excel PDF Total Activities: 13 Show All Paginate , Previous1234 Click on column headings to sort the list on the column Plant Part All parts ... Essential Oil Flower Flower Essent. Oil Fruit Fruit Juice Husk Essent. Oil Leaf Leaf Essent. Oil Petiole Plant Rhizome Rhizome Essent. Oil Root Root Essent. Oil Seed Shoot Shoot Essent. Oil Silk Essent. Oil Silk Stigma Style Wood Low PPM High PPM StdDev *Reference Zingiber officinale Rhizome Essent. Oil -- -- * *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.