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Hugo
de Vries

Amsterdam (Evolution Tree)


Eduard Adolf
Strasburger

Rheinische Friedrich-Wilhelms-Universität Bonn




Arend Joan Petrus
Oort

Wageningen University


George Edward
Stone

Massachusetts Agricultural College (Plant Biology Tree)


Ralph Eliot
Smith

UC Berkeley (Plant Biology Tree)


Peter Alexander
Ark

UC Berkeley (Plant Biology Tree)


Johan
Dekker

Wageningen University

Pierre J.G.M.
de Wit

Wageningen University
(Options)

Pierre de WitX