The rust Herbarium in Berlin (B) is one of the world's richest collections of rust fungi. The author's inventory of Uredinales types at B has shown that the number of types not previously separated from the main herbarium is significant. Of the c. 100 000 images scanned, over 1900 rust type specimens, representing 1380 species, were recognized. With further scrutiny more type specimens and species are expected to surface.
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