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)
From this point of view the attainable aim would be the restoration or regeneration of the original stands. It is impossible to draw the borders of Quercetum petraeae-cerris and Querco petraeae-Carpinetum stands because of the military object. (The same holds in respect of Quercetum petraeae-cerris and OrnoQuercetum pannonicum on the peak). Ranges 1, 4-5, 10-11 and 20-24: The south and southwest slopes of Mt Pilis are covered with Orno-Quercetum pannonicum. In the lower part of valleys and gullies running to south and southwest directions (ranges 4, 5, on the border of 10 and 11) where the surface is covered with thick brash motley forest with Fraxinus ornus, Tilia species and a few Acer campestre trees can be found in some places with scattered herb layer and dense shrub layer. On the steep slope and verge of the valleys and on the ridge the Orno-Quercetum stand is thinned and replaced by Ceraso-Quercetum. pubescentis. On the exposed, rocky habitats with shallow soil the forest is thinned therefore in some places it becomes an open slope steppe grassland (Caricetum humilis balatonicum) and more often a closed grassland (Diplachno-Festucetum sulcatae balatonicum). (First of all on the area of 4A, 5B, 10, 11 and 24A in Pilisszentkereszt). The principle of nature conservation, which says that the protection of species can be successful via the protection of habitats and associations, refers to most of all for the Quercetum petraeae-cerris stands of the IV. strictly protected area and the latter mentioned stands and habitats (and also for the above mentioned Vaskapu rock). Many protected plants, among them many strictly protected species, live on these areas forming a scattered population on a large area or an endangered population on a dwindled area (for example Ferula sadleriana at ranges 24A, 10, 11). Significant protected species are: small population of Sesleria sadleriana in 4A, Iris graminea and Iris variegata in oak forests, Orchis pallens in shrub forests, and Anemone sylvestris, Orchis purpurea, Adonis vernalis and Vicia sparsiflora. Pilisszentlélek Ranges 11, 12, 20 and 21: On the area of these four ranges on the northnortheast slope of the hill Fekete-hegy Asperula odorata-type Querco petraeaeCarpinetum and Melitti-Fagetum stands can be found. In the herb layer, beside or instead of Asperula odorata, larger or smaller spots of Carex pilosa are present. The presence of Mercurialis perennis in great quantities is typical especially in the ranges 12 and 20, where it is a dominant element of grass in habitats with shallow soil and rocks. On the steep slopes Querco petraeae-Carpinetum and Melitti-Fagetum stands mixed with a lot of Tilia cordata and Tilia platyphyllos are already transitions towards Tilio-Fraxinetum. On the three northern ridges of
