1. USDA Agricultural Research Service, Northern Plains Agricultural Research Laboratory, 1500 N. Central Ave., Sidney, Montana 59270, USA
2. University of Idaho, Department of Plant, Soil and Entomological Sciences, Moscow, Idaho 83844, USA
3. Idaho Department of Fish and Game, Idaho Natural Heritage Program, 600 South Walnut, Boise, Idaho 83707, USA
4. Boise State University, Department of Biological Sciences, Boise, Idaho 83725, USA