Kjöbenhavn, Thieles Bogtrykkeri, 1861 & 1869 8vo. Bound with the original printed front wrappers in a nice recent half calf. With author's presentation to front wrapper: ""Høivelbaarne / Hr. Conferentsraad David / F. Didrichsen (i.e. English: ""To the Right Honourable Mr. Privy Councellor / F. Didrichsen""). Wrappers with light wear and two stamps. Otherwise nice and clean. 40, 49-102 pp.
Presentation copy of Didrichsen's critical commentary on Linné. Didrik Ferdinand Didrichsen was a Danish botanist and physicist. He participated as botanist in the first Galathea Expedition. In 1851, he began work as a librarian at the botanical gardens in Copenhagen. From 1856 to 1875 he was an associate professor of botany.