This work attempts to distinguish morphologically and ecologically four separate species from the Pleurotus ostreatus group: Pleurotus columbinus Quél. apud Bres., Pleurotus cornucopiae (Paulet ex Pers.) Roll., Pleurotus ostreatus (Jacq. ex Fr.) Kummer and Pleurotus pulmonarius (Fr.) Quél. Crossing experiments show that these are separate species. The geographical races and the American cultivated strain "Pleurotus Florida Eger" are discussed and efforts are made to classify it under one of the European species. The influence of the substrate on fruitbody morphology is also discussed.
Hilber O. (1977): Einige Aspekte aus der Pleurotus ostreatus Gruppe. – Česká Mykologie 31(3): 142–154.
