Data Views Total Plants: 3 CSV Excel PDF Total Activities: 11 Click on column headings to sort table by that column Plant Part Low PPM High PPM StdDev *Reference Lycopodium selago Plant -- 183.0 1.0 * Lycopodium serratum Plant -- 0.2 -1.0 * Huperzia spp Plant -- -- * *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.