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

Gills: free, decurrent, at first whitish, then orange-red. Stem: central or excentric, colour similar or slightly paler than that of cap. Flesh: in cap faint rose, in stem yellowish, yellowish-reddish. Substance (texture) characteristic rubbery. Scent fruit-like, taste bitter. Life-strategy: lignicolous saprobiont. Occurrences in Hungary, habitats: on dead deciduous tree trunks, branches. In groups, sometimes in dense clumps. Mainly in oak-ash-elm gallery forests in the milder areas (in lowland to hilly (collin) regions) on Ulmus, but also in rather wet beech forests on Fagus. Distribution, frequency: Holarctic species, from Northern Asia to Europe, known also from North America (KRIEGLSTEINER 2001). Hungarian red list category: 2. Justification: The survival of this species is questioned because of the improper forest management practices, e.g. the clearing of dead wood. Beside its rarity, it has special ecological requirements (wet, decaying dead wood). Known Hungarian records: BABOS (1989, 1999): Vaskút. SILLER (1999): Mátra: Kékes (Aconito-Fagetum). Private collection of I. Siller: Gemenc. Russula claroflava Grove (Russulales, Russulaceae) (Syn.: Russula flava Romell) Cap: 4-10 cm in diameter, at the beginning convex, then flattening, often depressed in the middle; unicoloured, golden yellow or rich yellowish orange, surface non-reflecting, dull. Gills', decurrent; white when young, later ochraceous yellow, becoming greyish if cut or when old. Stem: 3-6 cm long, 1-2 cm thick, of even thickness; white at first, then ochraceous, finally becoming grey. Flesh: whitish, becoming grey, then black at the end if pressed, cut or old. Without characteristic scent, it taste is not hot. Life-strategy: mycorrhiza. Occurrences in Hungary, habitats: August-October, in acidic deciduous forests and Sphagnum-bogs. Distribution, frequency: Holarctic, northern species. Known from North America, Northern Asia and Europe. In Europe very rare in Southern and Central Europe (KRIEGLSTEINER 2000). Hungarian red list category: 3.