mother disappears (probably dies, but there is no record of what happened to her, or when)
1775 his father, Christian Daniel Persoon, sends him to school in the Netherlands, at Lingen-on-the-Ems
1776 April 22 his father dies in South Africa. Persoon inherits 833 ryxdaalders, plus some fancy clothes and ornaments, out of an estate of 20,690 ryxdaalders
studies theology at Halle/Saale
studies medicine at Leiden and Gottingen
1799 graduates with a PhD from the Leopoldina Academy; stays on in Gottingen as a private scholar
1802 moves to Paris, where he stays for the rest of his life
It's difficult to talk about Peroon's life, because not much happened in it. Even the few dates we have for him are in doubt: for instance, I've gone with Isley on the year of his move to Paris; this is a convenient middle ground between the 1803 given by Dörfelt & Heklau and the 1801 given by The Dictionary of the Fungi. I'm using the birth and death dates given (and calculated) from a notice of his death given in a South African newspaper and reproduced in Lloyd; but one of Isley's sources says that there really are no trustworthy sources for those dates. He had no career. He doesn't seem to have ever held a paying job, or even to have ever sought one. I have yet to see any plausible explanation for how he managed to eat for all those years, let alone fund the publication of his books. The rest of his father's estate, by the way, went to his two sisters. Presumably they needed big chunks of cash for dowries, while Persoon was expected to make his own way. If so, his father was sadly mistaken...
Persoon was the first successful mycological systematist. Linnaeus' taxonomy of the fungi sucked: it was overly general and tended to lumpspecies into huge piles, with no indication of what their important features were or how to make better sense of their relationships. Persoon created a system that could handle everything in a rational and understandable way. He used, roughly, Linnaeus' division of the kingdom by type of hymenophore, but then broke those divisions down into genera which mostly still survive today (and are very familiar: see the list below). While Fries' spore-color system took over for the gilled mushrooms (and, oddly enough, the other Hymenomycetes), Persoon's taxonomy is still the starting point for the nomenclature of the Ustilaginales, Uredinales and the Gasteromycetes.
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