Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 91. (Budapest 1999)

Bohus, G., Vasas, G. ; Locsmándi, Cs.: Two new fungus species from Hungary (Basidiomycetes, Agaricales)

"ungerührt" (without touch) state of the fungus, but on the exhibition of the Société Mycologique dc France in Trento, 1968. The best representation of this species is found in the monograph of RIVA (1988: 68), depicting this fungus in "ungerührt" (without touch) state as a characteristic representative of the Tricholosporum taxon. The validity of T. tetragonosporum MAIRE (1945) as a separate species has been debated by some mycologists. According to JOSSERAND (1949), it is a form of T. goniospermum ("une simple forme"). According to BON (1974) it is synonymic to T. goniospermum. A publication of BOHUS (1985) supported this view. There were also some uncertainties about the new species, but on a closer observation some specific characteristics were found (see Table 1 with diagnostic features of this group). Diagnosis latina. Fungus differt a Tricholomate goniospermo (apud BRESADOLA 1892, apud JOSSERAND 1949 et pro parte apud BON 1974) in pileo viscido, carne vivido luteo in vicinitate lamellarum, in brunnescentia lamellarum et stipitis. Sporae minores: 5-7.8 x 4.6-6.2 mm. Cheilocystidia adsunt. Habitatio: magis vero, in silva frondosa. Description. Pileus: 6-15 cm across, semiglobate, then flattening, compact, fleshy, colours when not touched: ochre or yellow to lemon-yellow, browning when handled, viscid, locally more or less shiny, naked. Margin young involute. Cuticule may be more or less peel. - Lamellae: form as those of Tricholoma, very crowded, light ochre, a greyish whitish, greyish, finally with a light lilac nuance, after drying (the preparation) with a roseate-lilac tinge, slowly browning. - Stem: 5-9 cm long, 0.8-2 cm thick, cylindrical, it may be bulbous, white, browning when handled, towards the apex with a Hebeloma sinapizans-\ike structure (Lupe) or mealy or smooth. - Flesh: whitish, in the neighbourhood of the lamellae lively yellow, on the cut-surface it may be yellowing. - Smell: not characteristic. - Spores: 5-7.8 x 4-6.2 mm, stauriform or cruciate. - Cheilocystidia: fusiform, langeniform or basidioid, 20-50 x 6-8 mm. - Clamps: present especially in hymenial trama. Epicutis: hyphae 2-3 mm wide. - Occurrence: in spring, in frondose wood. - Remark: the colour of the lamellae may be somewhat violaceous-lilaccous at some gatherings. Table 1. Delimitation of the Tricholosporum species occurred in Europe and North-Africa subgoniospermum goniospermum goniospermum tetragonosporum BOHUS et VASAS, BRESADOLA BRESADOLA apud MAIRE sp. n. JOSSERAND Pileus viscid not viscid not viscid not viscid Lamellae browning when not browning not browning not browning handled when handled when handled when handled Stem browning when not browning not browning not browning handled when handled when handled when handled Flesh colour on vivid yellow not yellow not yellow not yellow cut-surface near lamellae Spores 5-7.8x4.7-6.2 mm 8-10x5-7 mm 8-8.5x6-6.5 mm 6-7x4-5 mm Cheilocystidia present absent absent absent Epicutis hyphae 2-3 mm wide 5 mm wide 3—4 mm wide Clamps present few present Annls hist.-nut. Mus. nam. hung. 91, 1999