Data Views Total Plants: 2 CSV Excel PDF Total Activities: 19 Click on column headings to sort table by that column Plant Part All Seed Stem Low PPM High PPM StdDev *Reference Camptotheca acuminata Seed -- 300.0 * Camptotheca acuminata Stem -- 100.0 * *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.