Erik Acharius | |
|---|---|
 | |
| Born | 10 October 1757 |
| Died | 14 August 1819 (aged 61) |
| Citizenship | Sweden |
| Alma mater | Uppsala University |
| Known for | Pioneering lichenology |
| Awards | Member of the Linnean Society |
| Scientific career | |
| Fields | Botany Lichenology |
| Academic advisors | Carl Linnaeus |
| Author abbrev. (botany) | Ach. |
Erik Acharius (10 October 1757 – 14 August 1819) was a Swedish botanist who pioneered the taxonomy of lichens and is known as the "father of lichenology". Acharius was famously the last pupil of Carl Linnaeus.