Ferdinand Tessendorff (1879 - 1924) and his Hieracium collection

The Hieracium (Compositae: Cichorieae) collection of Ferdinand Tessendorff (1879–1924) was recently located in the backlog of the Botanical Museum Berlin. It comprises 565 specimens, including several types, which have now been incorporated into the general herbarium. A digest of the life and work of Tessendorff, a high school teacher and amateur botanist in Berlin, is presented.

The status of the 11 type specimens present in the collection is discussed, their taxonomy is assessed, new synonymies are proposed and four names are lectotypified.