Data Views Total Plants: 3 CSV Excel PDF Total Activities: 1 Click on column headings to sort table by that column Plant Part All Plant Seed Low PPM High PPM StdDev *Reference Strophanthus kombe Seed -- -- * Apocynum cannabinum Plant -- -- * Strophanthus hispidus Seed 650.0 6500.0 * *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.