Matthew G. Johnson,^1,* Elliot M. Gardner,^1,2 Yang Liu,³ Rafael Medina,³ Bernard Goffinet,³ A. Jonathan Shaw,⁴ Nyree J. C. Zerega,^1,2 Norman J. Wickett<sup>1,2

1</sup>2Chicago Botanic Garden, 1000 Lake Cook Road, Glencoe, Illinois 60022 USA;
²3Plant Biology and Conservation, Northwestern University, 2205 Tech Drive, Evanston, Illinois 60208
³4Department of Ecology and Evolutionary Biology, University of Connecticut, 75 N. Eagleville Road, S
⁴5Department of Biology, Duke University, Box 90338, Durham, North Carolina 27708 USA

^*Author for correspondence: mjohnson@chicagobotanic.org