1. Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, Michigan 48109‐1005 USA
2. Museum of Paleontology, University of Michigan, Ann Arbor, Michigan 48109‐1079 USA
3. Department of Earth Sciences, Royal Holloway University of London, London, UK, TW20 0EX
4. Herbarium, Singapore Botanic Gardens, National Parks Board, Singapore 259569
5. Department of Plant and Microbial Biology, Integrative Biology and the University and Jepson Herbaria, University of California, Berkeley, California 94750‐2465 USA
6. Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
7. Advanced Photon Source, Argonne National Laboratories, Argonne, Illinois 60439 USA
8. Advanced Light Source, Lawrence Berkeley National Laboratories, Berkeley, California 94720 USA