Methodus Lichenum
Publishes an influential system for identifying and classifying lichens.
Historical biography archive · Updated 2026-11-03
Erik Acharius Biography and Timeline
Follow Erik Acharius through 2 dated historical records for Sweden.
Erik Acharius, historical timeline
A chronological timeline drawn from matching World History Database records.
2Distinct records
1 of 1Page
1803–1803Years on this page
1803
Systematic Lichen Classification
Establishes lichenology as a specialized field of botanical study.
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.