Joseph Dalton Hooker
Hooker, Joseph Dalton

(b. June 30, 1817 – d. December 10, 1911)

United Kingdom of Great Britain and Ireland

Identified Rubiaceae and collected Dicranaceae

William Starling Sullivant
Sullivant, William Starling

(b. January 15, 1803 – d. April 30, 1873)

United States of America

Identified Hypnaceae and collected Hypnaceae

John Torrey
Torrey, John

(b. August 15, 1796 – d. March 10, 1873)

United States of America

Identified COMPOSITAE and collected Asteraceae