Author Affiliations +
JamesA. Pfister,* KipE. Panter*
*Authors are Rangeland Scientist, jim.pfister@ars.usda.gov (Pfister) and Reproductive Toxicologist and Research Leader (Panter), 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. 8036 of the Utah Agricultural Experiment Station.