Oswald
Heer

Universität Zürich (Systematics Tree)


Carl Wilhelm
von Nägeli

University of Munich (Systematics Tree)


Simon
Schwendener

Universität Berlin (Systematics Tree)


Heinrich
Göppert

University of Breslau (Chemistry Tree)


Adolf
Engler

Royal Botanical Gardens and Museums of Berlin (Chemistry Tree)


Johannes
Buder

Martin-Luther-Universität Halle-Wittenberg


Hans Günter
Schlegel

Universität Göttingen

Dietrich
Nies

Martin Luther University Halle-Wittenberg
(Options)

Christopher
Rensing

University of Arizona

Christopher J.
Haney

University of Arizona

Davide
Quaranta

University of Arizona

Jutta E.
Elguindi

University of Arizona

Dietrich NiesX