The 13th edition of this standard iconography of the genus Cortinarius treats two different subgenera. Pars XIII (1) deals with subgenus Phlegmacium, section Fulvi, a group of small to large species with brown pileus, a bulbous stipe base, and amygdaliform or limoniform spores. 40 Taxa are treated, of which 13 are new to science. Pars XIII (2) deals with subgenus Hydrocybe sect. Obtusi. About 70 taxa are treated, of which also 13 newly described. All taxa are well-described, with elaborate line-drawings of microscopical features, and colour plates in pencil of high quality. Identification keys are provided.