Amos
Eaton

RPI (Chemistry Tree)


John
Torrey

Columbia


Asa
Gray

Harvard


Charles Edwin
Bessey

University of Nebraska


John
Torrey

Columbia


Asa
Gray

Harvard


Charles Edwin
Bessey

University of Nebraska



John E.
Weaver

University of Nebraska
(Options)

J. Stan
Rowe

University of Saskatchewan

Edward A.
Johnson

University of Calgary

Herbert Christian
Hanson

Catholic University

John M.
Aikman

Iowa State

Frederick W.
Albertson

Fort Hays State University

Harold
Heady

UC Berkeley

James W.
Bartolome

UC Berkeley (Public Policy Tree)

Lee Merriam
Talbot

George Mason

Fred L.
Bunnell

UBC (Neurotree)

Jesse Theuri
Njoka

University of Nairobi

Robert T.
Coupland

University of Saskatchewan

Fred E.
Smeins

Texas A & M

Brian Harrison
Walker

Commonwealth Scientific and Industrial Research Organisation

John WeaverX