Clara May Mack

American botanist

American physiologist

American botanist

American botanist

Agronomist, mycologist, and botanist

American embryologist

American geneticist

American ornithologist

American botanist and botanical collector

American botanist and botanical collector

American entomologist

American botanist

American bryologist, botanist and botanical collector

American university teacher, botanist and botanical collector

America botanist, botanical collector and gardener

American teacher, botanist

American botanist

American botanist, horticulturist and author

American zoologist, marine biologist, scientific illustrator and poet

American cryptogamic botanist and university teacher