Eduard C.
Verschaffelt

Amsterdam (Chemistry Tree)


Hendrik Marius
Quanjer

Wageningen University (Chemistry Tree)


S. J.
Wellensiek

Wageningen University








Frits Warmolt
Went

Washington University (Chemistry Tree)


Samuel Barnett
Schryver

Imperial College (Chemistry Tree)




Thomas Hunt
Morgan

Caltech (FlyTree)


Alfred Henry
Sturtevant

Caltech (Neurotree)


Hugo
de Vries

Amsterdam (Evolution Tree)


Eduard Adolf
Strasburger

Universität Bonn (Marine Ecology Tree)




Hugo R.
Kruyt

Utrecht (Chemistry Tree)


Hendrik G.
Bungenberg de Jong

Leiden (Chemistry Tree)


Paul
Jaccard

ETH Zürich (Chemistry Tree)


Albert
Frey-Wyssling

ETH Zürich (Chemistry Tree)


James Frederick
Bonner

Caltech (Neurotree)


Erwin
Baur

Kaiser-Wilhelm-Institut für Züchtungsforschung


Elisabeth
Schiemann

Deutsche Forschungshochschule


Fritz
von Wettstein

Kaiser-Wilhelm-Institut für Biologie


Georg
Melchers

Kaiser-Wilhelm-Institut für Biologie




Frits Warmolt
Went

Washington University (Chemistry Tree)




Frits Warmolt
Went

Washington University (Chemistry Tree)




Alfred Henry
Sturtevant

Caltech (Neurotree)




Hendrik G.
Bungenberg de Jong

Leiden (Chemistry Tree)


Albert
Frey-Wyssling

ETH Zürich (Chemistry Tree)


James Frederick
Bonner

Caltech (Neurotree)


Anton
Lang

Michigan State


Jan A. D.
Zeevaart

Michigan State


Felix
Gustafson

University of Michigan


Helmut
Beinert

UW Madison (Neurotree)


Frederick Loring
Crane

Purdue (Chemistry Tree)


Charles
Arntzen

UIUC (Chemistry Tree)


John E
Mullet

Texas A & M

Robert A
Creelman

Mendel Biological Solutions
(Options)

Robert CreelmanX