The article reports the finding of Lactarius mairei Malengon on calcareous soil at Karlštejn under Quercus pubescens and Crataegus oxyacantha; a description of the Karlštejn fruitbodies is given. A new species, Lactarius pilatii sp. nov., close to Lactarius vietus (Fr.) Fr., is also described, collected by A. Pilát several times in the Šumava Mountains near Horská Kvilda.
Schaefer Z. (1968): Lactarii cechoslovaci rariores vel novi. IX. – Česká Mykologie 22(1): 14–19.