Author Affiliations +
BenedictT. Green,* DaleR. Gardner,* JamesA. Pfister,* Daniel Cook*
*Authors are Research Pharmacologist (Green), Research Chemist (Gardner), Rangeland Scientist, jim.pfister@ars.usda.gov (Pfister), and Plant Physiologist (Cook), Poisonous Plant Research Laboratory, Agricultural Research Service, United States Dept of Agriculture, 1150 E 1400 N, Logan, UT 84341, USA. Published with the approval of the Director as Journal Paper No. 8038 of the Utah Agricultural Experiment Station.