A
- Erik Acharius
- Julián Acuña Galé
- Johann Friedrich Adam
- Nancy Adams
- Carl Adolph Agardh
- Jacob Georg Agardh
- Nikolaus Ager
- William Aiton
- Frédéric-Louis Allamand
- Carlo Allioni
- Prospero Alpini
- Benjamin Alvord
- Eliza Frances Andrews
- Giovanni Arcangeli
- David Ashton
- William Guybon Atherstone
Read more about this topic: List Of Botanists