Species classified by Raper and Thom (1949) in the subsections Fasciculata, Lanata and Funiculosa of the genus Penicillium are revised. Hundreds of strains mainly isolated from food products were studied and compared with authentic and type strains. Mainly on the basis of morphological characters of the conidiogenous structures a new classification is proposed. The accepted species are: P. claviforme Bain., P. clavigerum Demelius, P. commune Thom, P. concentricum Samson, Stolk & Hadlok, spec. nov., P. echinulatum Fassatiová, P. expansum Link ex S. P. Gray, P. granulatum Bain., P. griseofulvum Dierckx, P. hordei Stolk, P. isariiforme Stolk & Meyer, P. italicum Wehmer var. italicum, P. italicum Wehmer var. avellaneum Samson & Gutter, var. nov., P. lanosum Westling and P. verrucosum Dierckx.
The last name is re-introduced to include the morphologically identical species P. ochraceum Thom, P. viridicatum Westling, P. olivinoviride Biourge, P. palitans Westling, P. cyclopium Westling, P. puberulum Bain., P. martensii Biourge, P. aurantiovirens Biourge, P. crustosum Thom, P. corymbiferum Westling and most of the species of the P. commune -series and the P. terrestre -series. To distinguish macroscopically recognizable groups within P. verrucosum, the varieties album, corymbiferum, cyclopium, melanochlorum var. nov. and ochraceum are proposed. Descriptions and illustrations of the accepted species and varieties are given. The taxa are keyed out synoptically and dichotomously.
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