1. Department of Integrative Biology, University of California, Berkeley, 3040 Valley Life Sciences Building #3140, Berkeley, CA 94720, USA
2. University Herbarium, University of California, Berkeley, 1001 Valley Life Sciences Building #2465, Berkeley, CA 94720, USA
3. Department of Paleontology, Perot Museum of Nature and Science, 2201 N. Field Street, Dallas TX 75201, USA
4. Department of Plant Biology, University of Vermont, 111 Jeffords Hall, 63 Carrigan Drive, Burlington, VT 05405, USA
5. The Pringle Herbarium, University of Vermont, 305 Jeffords Hall, 63 Carrigan Drive, Burlington, VT 05405, USA
6. Department of Botany, California Academy of Sciences, Golden Gate Park, 55 Music Concourse Drive, San Francisco, CA 94118, USA
7. Museum of Paleontology, University of California, 1101 Valley Life Sciences Building, Berkeley, CA 94720, USA