1. Arizona State University, Department of Applied Sciences and Mathematics, Polytechnic Campus, 6098 Backus Mall, Mesa, Arizona 85212 USA
2. University of Alaska, Department of Biology and Wildlife, Institute of Arctic Biology and University of Alaska Museum of the North Herbarium, 907 Yukon Drive, Fairbanks, Alaska 99775‐6960 USA
3. Arizona State University, School of Life Sciences, Tempe, Arizona 85287‐4501 USA
4. Tehran University, Department of Biology, Tehran, Iran