Per Magnus Jørgensen (born 1944) is a Norwegian botanist and lichenologist, and Professor Emeritus of systematic botany at the University of Bergen.
[2] In 1978, he earned a doctor philosophiae from University of Bergen, with a dissertation titled "The lichen family Pannariaceae in Europe".
[2] A few years after receiving his doctorate, he was appointed Professor of Systematic Botany at the University of Bergen in 1982.
He has about 300 publications dealing with the systematics, floristics, biogeography, and nomenclature of lichens;[1][2] in these papers he described about 300 taxa new to science.
[1] Examples include books on the history of botany in Norway, and on the history of Bergen's Museumgarden, and publications on Carl Linnaeus and Johan Ernst Gunnerus, including translating the latter's 1770 work Flora Norvegica from Latin into Norwegian.