Data Views Total Plants: 3 CSV Excel PDF Total Activities: 13 Click on column headings to sort table by that column Plant Part All Plant Stem Low PPM High PPM StdDev *Reference Ephedra sinica Stem -- -- * Ephedra spp Plant -- -- * Pinellia ternata Stem -- -- * *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.