Data Views Total Plants: 482 CSV Excel PDF Total Activities: 31 , Previous1..16171819202122232425 Show all rows. Paginate rows. Click on column headings to sort table by that column Plant Part All Aril Bark Bud Bulb Flower Fruit Herb Leaf Plant Rhizome Root Seed Shoot Silk Stigma Style Sprout Seedling Stem Tuber Pt Low PPM High PPM StdDev *Reference Zizyphus spina-christi Fruit -- 0.4 -0.6 * Zizyphus jujuba Fruit 0.2 1.3 -0.5 * *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.