1. Oklahoma Biological Survey and Dept of Microbiology and Plant Biology; 111 E. Chesapeake St. Univ. of Oklahoma Norman OK 73019 USA
2. Dept of Botany and Biodiversity Inst.; Berry Center 231, 1000 E. University Ave., Univ. of Wyoming; Laramie WY 82071 USA
3. Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, Univ. of Copenhagen; DK-2100 Copenhagen Denmark