B. Papp szerk.: Studia Botanica Hungarica 36. 2005 (Budapest, 2005)

Siller, Irén, Vasas, Gizella , Pál-Fám, Ferenc , Bratek, Zoltán , Zagyva, Imre; Fodor, Lívia: Hungarian distribution of the legally protected macrofungi species

Polyporus tuberaster (Jacq.) Fr. (Polyporales, Polyporaceae) (Syn: Polyporus forquignoni Quel., Polyporus lentus Berk.) Cap: 5-25 cm in diameter, flattened, round or kidney-shaped, may be funnel-shaped in the middle; surface scaled in circles, scales flattened onto surface, erect towards cap-margin; colour yellow to ochraceous brown with darker scales. Hymenium: pored, slightly decurrent, colour pale yellow to yellowish brown. Stem: most often central, seldom lateral, cylindrical, creamy, surface felty. Flesh: soft, thick, whitish, of mushroom smell and taste. Life-strategy: xylophagous, saprobiont (mainly on Fagus, Quercus spp. substrates) Occurrences in Hungary, habitats: consists of 3 ecotypes: May-October, mostly on stumps or on branches near above soil, sometimes joined to wood in the soil with thick rhizomorph-like mycelium. Less frequently in Hungary (only 2 records) it develops from a large black Sclerotium ("gombakő") lying deep in the soil. Occurs in protected, warm and well-lit forests, mainly in gallery forests, in Querco-Carpinetum mixed beech woods, in wet and nutrient-rich soil. Avoids closed forest. Distribution, frequency: all over in Europe, Asia and North America. In Central Europe mostly on Fagus, and Quercus, however, production of Sclerotium is not known in all sites. Sclerotium-production requires appropriate climatic and exogenic factors, since this is a thermofrequent species. In Mediterranean areas these conditions are more widely available than in oceanic, continental or cold climates. Hungarian red list category: 3. Justification: Endangered because of the lack of adequate amounts and quality of dead wood in consequence of present-day forest management, and because of the excellent qualities of this edible, rare species. Known Hungarian records: VASAS and ALBERT (1987): Budai-hegység: Normafa (ad truncum putr.: Fagus), Vérteskozma, Zselicség (ad truncum putr.), Bükk: Létrás (ad truncum putr.), Bükk: Nagy-kerek-hegy (ad truncum putr.), Csapod: Horpácsi-erdő, Aggteleki-karszt: Trizs, Aggteleki-karszt: Rozsnyi-útibérc (ad truncum putr.), Zempléni-hegység: Makkoshotyka (ad truncum putr.), Bakony: Csesznek (in fageto ad truncum putr.), Gerecse: Tarján (ad truncum putr.). BP: Bakony: Zirc (ad truncum putr.), Aggteleki-karszt: Jósvafő, Tohonya-bérc (ad truncum putr.). Private collection of F. Pál-Fám: Bakony: Som-hegy (Daphno laureolae-Fagetum), Veszprém, Budapest: Kamara-erdő (in Quercetum). FODOR et al. (2001): Szigetköz: Derék-erdő (Piptathero virescenti-