John Lindley (English, 1799 – 1865)
Elizabeth Blackwell (Scottish, 1707–1758)
Louis Antoine Cusin (French, 1824-1901)
Guillaume Sicard (French, 1829-1886)
Nikolaus Joseph Freiherr von Jacquin (Dutch, 1727 – 1817)
Pierre Joseph Redouté (French, 1759-1840)
Sebastian Kneipp (German, 1821 – 1897)
Isaac Sprague (American, 1811 – 1895)
Henri-Louis Duhamel du Monceau (French, 1700-1782)
John Henry Twachtman (American, 1853-1902)
Mary Daisy Arnold (American, 1873 – 1955)
Edward Step (English, 1855-1931)
Maurice Pillard Verneuil (French, 1869-1942)
Robert John Thornton (English, 1768-1837)
Bertha Jaques (American, 1863 – 1941)
Richard Duppa (English, 1770–1831)
Deborah Griscom Passmore (American, 1840–1911)
Elizabeth Blackwell (Scottish, 1707–1758)
James Andrews (English, 1801–1876)
William Jackson Hooker (English, 1785 – 1865)
Mary Vaux Walcott (American, 1860-1940)
Mary Vaux Walcott (American, 1860-1940)
William Roxburgh (Scottish, 1751 – 1815)
George Cochran Lambdin (American, 1830-1896)
Sarah Featon (New Zealander, 1848 – 1927)
William Jackson Hooker (English, 1785 – 1865)
Bertha Heiges (American, 1866-1956)