Data Views Total Plants: 2 CSV Excel PDF Total Activities: 1 Click on column headings to sort table by that column Plant Part All Plant Wood Essent. Oil Low PPM High PPM StdDev *Reference Aloe vera Plant -- -- Pakistan Encyclopedia Planta Medica. 1986. Aquilaria agallocha Wood 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.