Josiah Gregg
Gregg, Josiah

* July 19, 1806 – February 25, 1850 †

United States

Collected Asteraceae and identified Sapindaceae

Orcutt, Charles Russell

* April 27, 1864 – August 25, 1929 †

United States

Collected Asteraceae and identified Fabaceae

Cyrus Pringle
Pringle, Cyrus

* May 06, 1838 – May 25, 1911 †

United States

Collected Asteraceae and identified Poaceae

Charles Wright
Wright, Charles

* October 29, 1811 – August 11, 1885 †

United States

Collected Poaceae and identified Characeae