 Parts of Dahl's collections have been preserved in Sahlberg's herbarium in the Botanical Museum at the University of Helsinki, and in Giseke's herbarium in the Royal Botanical Garden at Edinburgh.Dahl died in 1789 in Turku at the age of 38.Dahl's inventories of flora around Skara and Saleby, and some of the papers he wrote during as a student at Skara and Uppsala are in the Olof Knös Collection in the county library of Skara.