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The genus Crepidotus in Europe is considered. After an examination of 550 collections seventeen species and eight varieties are recognized. Two keys are supplied; all taxa accepted are typified. Morphological, ecological and chorological characters are critically evaluated. Descriptive statistics are used for basidiospore size. An infrageneric classification is proposed based on phenetic relationships using different cluster methods. The new combinations C. calolepis var. squamulosus and C. cesatii var. subsphaerosporus are introduced. The spore ornamentation as seen in the scanning electron microscope provides the best character for species delimitation and classification.
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In the second part of this study special attention is paid to the genera Hebeloma, Psathyrella and Russula. Psathyrella rhombispora is described as a new species. Russula cicatricata Romagn., R. elaeodes (Bres.) Romagn. and R. purpurata Crawsh. are reduced to formae of R. graveolens Romell. in Britz.
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Gyroporus ammophilus, a poisonous bolete occurring in Pinus woods on sandy soils along the western Atlantic coast of the Iberian Peninsula, originally published as a variety of G. castaneus, is formally raised to the rank of species. The distinguishing characters of Gyroporus ammophilus are given against G. castaneus (Bull.: Fr.) Quél. The new species causes severe gastroenteritis when consumed.
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While preparing the Strophariaceae for the Flora agaricina neerlandica, vol. 4, and the new edition of the 'Standaardlijst van Nederlandse Macrofungi', the author decided to accept the generic concepts within the family as conceived by A.H. Smith (1979) and Kühner (1980) resulting in two genera: Psilocybe (comprising the genera Psilocybe s.str., Stropharia, Hypholoma or Naematoloma, and Melanotus), and Pholiota. This made the following new combinations and new taxa necessary.
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The names of two species of Phoma, discussed in recent papers, appeared to be illegitimate as later homonyms (Art. 64). Therefore the following new names are proposed as avowed substitutes.
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Last modified April 2, 1998 by P. Hovenkamp.