Data Views Total Plants: 241 CSV Excel PDF Total Activities: 2 Show All Paginate , Previous1..45678910111213 Click on column headings to sort the list on the column Plant Part All parts ... Aril Bark Bulb Flower Fruit Leaf Pericarp Plant Rhizome Root Seed Shoot Silk Stigma Style Stem Tuber Pt Low PPM High PPM StdDev *Reference Zingiber officinale Rhizome 0.9 42.0 1.0 * *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.