1. USDA, ARS; Poisonous Plant Research Laboratory; Logan UT 84341 USA
2. Department of Animal, Dairy and Veterinary Sciences; Utah State University; Logan UT 84322 USA
3. Office of Dietary Supplements; National Institutes of Health; 6100 Executive Blvd., Room 3B01 Bethesda MD 20892 USA
4. Forstzoologie und Entomologie; Albert-Ludwigs-Universität; D-79085 Freiburg Germany
5. LS Pflanzensystematik; Universität Bayreuth; D-95440 Bayreuth Germany