Unio Itineraria was a German scientific society which was based at Esslingen am Neckar in Baden-Württemberg, Germany.
1825 to promote scientific investigation through the collection and distribution of determined (identified) plant specimens.
Unio Itineraria was organized by botanist Christian Ferdinand Friedrich Hochstetter (1787–1860) and physician Ernst Gottlieb von Steudel (1783–1856).
[3] [4] The directors of Unio Itineraria raised funds through subscribers to the project to pay for expeditions and sold specimens as a dealership.
Several collectors are associated with the Unio Itineraria notably the organizers Ernst Gottlieb von Steudel and Christian Ferdinand Friedrich Hochstetter as well as the explorer collectors: After 1842 Rudolph Friedrich Hohenacker continued in editing and distributing remaining specimens of Unio Itineraria, among others in a series with the title W. Schimper pl.