Volume 4: Classis Ustomycetes (Ordines Tilletiales, Ustiladinales et Graphiolales). 2001. 67 figs. 19 tabs. 350 p. Paper bd.- In Bulgarian, with extensive English summary (35 p.).

Deals with the smut fungi in Bulgaria. The monograph treats 114 species on 162 host plants, making 206 smut-host combinations. The introductory chapter provides historical data about the investigations of that taxonomic group in Bulgaria and general information on its biology. The main body of the book consists of a key to the genera of smut fungi and descriptions of genera and species, including keys to the species of each particular genus if more than one species is found in Bulgaria. Each species description includes nomenclatural data, macroscopic and microscopic morphological features, list of the hosts, and distribution in Bulgaria. A host-fungus index and list of fungi are added.

Out of print. Good second hand copy. Small signature on title page.