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Caspar Georg Carl
Reinwardt
University of Harderwijk, Leiden University (Chemistry Tree)


Willem Hendrik
de Vriese
Leiden (Neurotree)


Willem Frederik Reinier
Suringar
Leiden (Chemistry Tree)


Hugo
de Vries
Amsterdam (Evolution Tree)


Wilhelm Rudolph
Fittig
Kaiser-Wilhelms-Universität Straßburg (Chemistry Tree)

Nathanael
Pringsheim
University of Jena (Marine Ecology Tree)

Julius
Sachs
University of Wurzburg




Volney Morgan
Spalding
University of Michigan
?


Samuel Mills
Tracy
Mississippi Agricultural Experiment Station


Beverly Thomas
Galloway
U.S. Department of Agriculture


Erwin Frink
Smith
U.S. Department of Agriculture

Frank Nicholas
Meyer
USDA
(Options)

Frank MeyerX