Edward Samuel Ritchie

American botanist

German-American gunsmith and naturalist

American physician, surgeon, and ornithologist

American physician, pharmacist and botanist

American paleontologist

Botanist

American naturalist, ornithologist, ichthyologist, museum curator, and the 2nd Secretary of the Smithsonian

German chemist, botanist, archaeologist and photographer

An Italian inventor and an associate of Giuseppe Garibaldi

American botanist and physician

American politician, farmer, printer and amateur ornithologist

German-American artist, topographical engineer, cartographer, botanist and geologist

American geologist

American conservationist

American artist

American biologist

American botanist, chemist & academic

American cleric, sugar scientist

Naturaliste américain

American botanist