George Engelmann
Engelmann, George

* February 02, 1809 – February 04, 1884 †

United States

Collected Pinaceae and identified Convolvulaceae

Martindale, Isaac Comly

* July 15, 1842 – January 03, 1893 †

United States

Collected Asteraceae and identified Asteraceae

Charles Sprague Sargent
Sargent, Charles Sprague

* April 24, 1841 – March 22, 1927 †

United States

Collected Rosaceae and identified Rosaceae

George Vasey
Vasey, George

* February 28, 1822 – March 04, 1893 †

United States

Collected Poaceae and identified Poaceae