1. Poisonous Plant Research Laboratory, Agricultural Research Service, United States Department of Agriculture, 1150 East 1400 North, Logan, Utah 84341, United States
2. Daniel K. Inouye College of Pharmacy, University of Hawaii at Hilo, 200 West Kawili Street, Hilo, Hawaii 96720-4091, United States
3. Stanley L. Welsh Herbarium, Brigham Young University, Provo, Utah 84602, United States
4. Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, Missouri 63110, United States