L. Lőkös szerk.: Studia Botanica Hungarica 27-28. 1996-97 (Budapest, 1978)

Szerdahelyi, Tibor, Penksza, Károly, Dobolyi, Konstantin Z., Szollát, György, Kapocsi, Judit; Figeczky, Gábor: Vegetation and point-mapping survey in the strictly protected areas of the landscape protection area of the Pilis Mts (Hungary)

Range 32: On the steep slope of the northern part of the range (part A) Tilio-Fraxinetum is present. South and southwest to the József Berda house an old Quercetum petraeae-cerris stand stretches. Its shrub layer and the undergrowth are rich, in the herb layer Melica uniflora dominate. Orchis pallens, Iris graminea and Iris variegata are present as protected plants. In the stand oak disease can be observed to a small extent. In part C a young stand of Querco petraeae-Carpinetum can be found. Its healthy growth is endangered by game damage. Range 33: These are Melica uniflora-type Melitti-Fagetum and Querco petraeae-Carpinetum forests, the latter one mixed with Fagus sylvatica. In the shrub layer Tilia cordata has considerable cover. In the herb layer, beside the dominant Melica uniflora, Asperula odorata and some patches of Carex pilosa are also present. Range 5: In the southwest edge of the range the Corno-Quercetum pubescenti-petraeae stand that was formed on mixed (limestone + sandstone) bedrock is similar in its growth rate to a Quercetum petraeae-cerris living on acidic soil, but the herb layer is relatively well developed with a cover of 50-60% and the number of real acidofrequent species is low. On the western border of this stand the Melica uniflora-type Quercetum petraeae-cerris stand is also transitional. In its herb layer, beside the high cover value of Melica uniflora, that of Oryzopsis virescens and Lithospermum purpureo-coeruleum are also significant. At lower elevation and south of the Corno-Quercetum pubescenti-petraeae stripe that covers a large part of the range Tilio-Fraxinetum is found on detritic rocks with Tilia platyphyllos, Quereus petraea, Carpinus betulus and Sorbus torminalis. Along the valley running west (on the border of ranges 5 and 9) and in the valley Acer pseudoplatanus and Acer platanoides are also present. Corno-Quercetum pubescenti-petraeae stand, that is enclosed between the Tilio-Fraxinetum and the Melica uniflora-type Querco petraeae-Carpinetum, looks similar to a Quercetum petraeae-cerris stand in its tree height and canopy structure, however, the species composition and the dominance hierarchy of its herb layer definitely identify it as a Corno-Quercetum pubescenti-petraeae stand. The part of the Quercetum petraeae-cerris stand near the border between ranges 4 and 5, south of the large Corno-Quercetum pubescenti-petraeae stand, is a little bit different from the middle or eastern typical stands of Melica uniflora- or Poa nemoralis-type Quercetum petraeae-cerris stands. This stand with closed tree layer, dense shrub layer and scattered herb layer (Melica uniflora, Oryzopsis virescens, Lithospermum purpureo-coeruleum) grows on mixed bedrock with acidic soil, in contrast with the nearby oak forests, and is related to the non-typical Corno-Quercetum pubescenti-petraeae stands described later at the foot of the hill in ranges 3 and 4.