Charles Sprague Sargent
Charles Sprague Sargent

April 24, 1841 – March 22, 1927

United States

Rosaceae

Collected Rosaceae and identified Rosaceae

John Kunkel Small
John Kunkel Small

January 31, 1869 – January 20, 1938

United States

Asteraceae

Collected Asteraceae and identified Brachytheciaceae