Data Views Total Plants: 621 CSV Excel PDF Total Activities: 112 , Previous1..23242526272829303132 Show all rows. Paginate rows. Click on column headings to sort table by that column Plant Part All Aril Bark Branches Bud Bulb Flower Fruit Fruit Juice Herb Hull Husk Leaf Pericarp Plant Rhizome Root Seed Shoot Silk Stigma Style Sprout Seedling Stem Tissue Culture Tuber Pt Low PPM High PPM StdDev *Reference Juglans nigra Pericarp -- -- * *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.