William John Burchell
Burchell, William John

* July 23, 1781 – March 03, 1863 †

United Kingdom of Great Britain and Ireland

Identified Asteraceae and collected Asteraceae

Johann Franz Drège
Drège, Johann Franz

* March 25, 1794 – February 03, 1881 †

Germany

Identified Lamiaceae and collected Asteraceae

Georg August Zenker
Zenker, Georg August

* June 11, 1855 – February 06, 1922 †

Germany; German Empire

Identified Fabaceae and collected Rubiaceae

Zeyher, Karl Ludwig Philipp

* August 02, 1799 – December 30, 1858 †

Germany

Identified Fabaceae and collected Asteraceae