Data Views Total Plants: 24 Total Activities: 21 CSV Excel PDF Previous12 Show all rows. Paginate rows. Click on column headings to sort table by that column Activity *Reference Vasodilator Merck 11th Edition *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.