Data Views Total Plants: 21 CSV Excel PDF Total Activities: 17 , Previous12 Show all rows. Paginate rows. Click on column headings to sort table by that column Plant Part All Bark Essential Oil Flower Fruit Gum Leaf Leaf Essent. Oil Plant Root Bark Shoot Stem Bark Hs Low PPM High PPM StdDev *Reference Vaccinium macrocarpon Fruit -- -- Duke, J. A. Writeups or information summaries on approximately 2,000 economic plants, USDA, ARS, Beltsville, MD 20705. *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.