at Uppsala University (matriculation 1773), one of the last of the students of Linnaeus; medical studies at Lund University (Ph.D. 1782)
Sweden
Archiv für die Botanik (1769-1805) ; Lichenographiae Suecia prodromus (1798), Methodus lichenum (1803), Lichenographia universalis (1810), Monog. Pyrenula (1812) ; J. P. Westring: Svenska lafvarnes färghist (1805-8) ; C. F. Thunberg: Flora Capensis (1807-20) ;
Royal Academy of Sciences in Stockholm; director of the Vadstena Hospital (which he had initiated) in 1795,
botanical drawing and watercolours ; hand-colouring