Unearthing a 19 th century mycological treasure: discovery of the first edition of Fries’s Scleromyceti Sueciae in the Schweinitz Herbarium at PH

A search for Fries’s Scleromyceti Sueciae at the Academy of Natural Sciences of Philadelphia (PH) was initiated following the receipt of a specimen annotated “Suec. Fr.” from the Schweinitz Herbarium. Study of the collection of fungi at PH revealed 340 similarly annotated specimens, 76 printed labels from Fascicles 1–6, and 8 of the first edition of the Scleromyceti Sueciae , and a page of the index from Decade XXXI of Fascicle 9. In many cases, sheets from this exsiccata were folded inward to form packets that enclosed both the specimen and the printed label. This paper also reports the discovery of 21 specimens from the Deutschlands Schwämme at PH.