Dorothy N. Gibson

January 21, 1920 – May 03, 2012

United States

Asteraceae

Collected Asteraceae and identified Verbenaceae

Eugene Cecil Ogden

January 30, 1905 – June 30, 2001

Potamogetonaceae

Collected Potamogetonaceae and identified Potamogetonaceae

Charles Russell Orcutt

April 27, 1864 – August 25, 1929

United States

Asteraceae

Collected Asteraceae and identified Fabaceae

Charles Christopher Parry
Charles Christopher Parry

August 28, 1823 – February 20, 1890

United States

Asteraceae

Collected Asteraceae and identified Polygalaceae

Collected Fabaceae and identified Polygonaceae

Donald John Pinkava

August 29, 1933 – July 25, 2017

United States

Asteraceae

Collected Asteraceae and identified Cactaceae

Henri François Pittier
Henri François Pittier

August 13, 1857 – January 27, 1950

Switzerland; United States; Venezuela

Fabaceae

Collected Fabaceae and identified Melastomataceae

L. Alan Prather

United States

Asteraceae

Collected Asteraceae and identified Polemoniaceae

Cyrus Pringle
Cyrus Pringle

May 06, 1838 – May 25, 1911

United States

Asteraceae

Collected Asteraceae and identified Poaceae

Collected Rosaceae and identified Gentianaceae

George Richardson Proctor

July 13, 1920 – October 12, 2015

United States

Rubiaceae

Collected Rubiaceae and identified Dryopteridaceae

Carl Albert Purpus

February 26, 1851 – January 17, 1941

German Reich

Asteraceae

Collected Asteraceae and identified Solanaceae

Heimo Rainer

Austria

Asteraceae

Collected Asteraceae and identified Annonaceae

John E. Rawlins

1950 – December 26, 2021

Asteraceae

Collected Asteraceae and identified Noctuidae

Blas Pablo Reko

1877 – February 1953

Austria

Fabaceae

Collected Fabaceae and identified Sapindaceae

James L. Reveal

March 29, 1941 – January 09, 2015

United States

Polygonaceae

Collected Polygonaceae and identified Polygonaceae

Joseph Nelson Rose
Joseph Nelson Rose

January 11, 1862 – May 04, 1928

United States

Cactaceae

Collected Cactaceae and identified Fabaceae

Velva Elaine Rudd

1910 – December 09, 1999

United States

Fabaceae

Collected Fabaceae and identified Fabaceae

Jerzy Rzedowski

December 27, 1926 – March 28, 2023

Poland; Mexico

Asteraceae

Collected Asteraceae and identified Poaceae

Jonathan Deininger Sauer

1918 – 2008

Amaranthaceae

Collected Amaranthaceae and identified Fabaceae

Johann Wilhelm Schaffner

1830 – 1882

Germany

Asteraceae

Collected Asteraceae and identified Poaceae

William August Schipp

1891 – 1967

Fabaceae

Collected Fabaceae and identified Euphorbiaceae

Evelyn Sharp

July 25, 1907 – April 17, 1999

United States

Brachytheciaceae

Collected Brachytheciaceae and identified Parmeliaceae

Thomas Robert Soderstrom
Thomas Robert Soderstrom

January 09, 1936 – September 01, 1987

United States

Poaceae

Collected Poaceae and identified Poaceae

Paul Carpenter Standley

March 21, 1884 – June 02, 1963

United States

Asteraceae

Collected Asteraceae and identified Rubiaceae

Louden Roberts Stanford

January 17, 1916 – January 30, 2010

Asteraceae

Collected Asteraceae and identified Onagraceae

William Campbell Steere
William Campbell Steere

November 04, 1907 – February 07, 1989

United States

Pottiaceae

Collected Pottiaceae and identified Pottiaceae

Julian Alfred Steyermark

January 27, 1909 – October 15, 1988

United States

Poaceae

Collected Poaceae and identified Rubiaceae

Collected Asteraceae and identified Asteraceae

Bonnie C. Templeton

October 23, 1906 – January 29, 2002

United States

Asteraceae

Collected Asteraceae and identified Hydrophyllaceae