![Asclepias grandiflora [Pachycarpus grandiflorus]](https://mdl.artvee.com/ft/50074pl.jpg)
Clemenz Heinrich Wehdemann (German, 1762 - 1835)

Illtyd Buller Pole-Evans (South African, 1879-1968)

Charles Antoine Lemaire (French, 1800-1871)

Sydenham Edwards (English, 1768-1819)

Leopold Zinnögger (Austrian, 1811-1872)

Alexander von Humboldt (German, 1769 – 1859)

Amanda Almira Newton (American, 1860-1943)

Sydenham Edwards (English, 1768-1819)

Charles Antoine Lemaire (French, 1800-1871)

Johann Wilhelm Weinmann (German, 1683-1741)

René de Rabié (French, 1700-1785)

Etienne Denisse (French, 1785–1861)

Edward Step (English, 1855-1931)

Louis Antoine Cusin (French, 1824-1901)

Hannah Borger Overbeck (American, 1870 – 1931)

Ellen Isham Schutt (American, 1873 – 1955)

Deborah Griscom Passmore (American, 1840–1911)

George Brookshaw (English, 1751–1823)

Sebastian Kneipp (German, 1821 – 1897)

Amanda Almira Newton (American, 1860-1943)

Jane Elizabeth Giraud (English, 1810-1868)

Anton Umpfenbach (German, 1821–1892)

Charles Antoine Lemaire (French, 1800-1871)

Sydenham Edwards (English, 1768-1819)

Mary Vaux Walcott (American, 1860-1940)

Luigi Balugani (Italian, 1737-1770)

Edward Step (English, 1855-1931)

Elizabeth Blackwell (Scottish, 1707–1758)