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)

The northwest-southeast ridge of the hill Vaskapu-hegy and the areas south of it (14, 15A) are covered with characteristic beech forest stands. Outstanding floristical value of the area is Pyrola rotundifolia which can be found on a steep northeast slope in a ruined pine forest. In the surroundings of the gully Vaskapuszurdok and north and west rocky slopes of the hill Vaskapu-hegy facing the valley Vaskapu-völgy Seslerio-Fagetum can be found, among which the most valuable stand is that of in the vicinity of the Vaskapu rock. The rock and its surroundings are favourable practising places for rock-climbers. Since it is on a strictly protected area, and treading and littering endanger the Sesleria sadleriana stands, it would be neccessary to designate a new practising place somewhere else in agreement with rock-climbers. The protection of Sesleria sadleriana and its punctual occurrence in Hungary makes it absolutely necessary. Pilis-oldal Ranges 16, 26-28: Deforestation of Querco petraeae-Carpinetum stands on the eastern steep slope caused soil erosion, and this is why Mercuriali-Tilietum stands have extended that had been here before. Now Querco petraeae-Carpinetum and Mercuriali-Tilietum are present with Fraxinus excelsior, Tilia, Acer and Ulmus species. The change of the original vegetation at the same time indicates the necessity of careful planning of the future silviculture. On the western edge of Pilis-oldal facing Pilis-tető, rocky grasslands and steppe grasslands can be found. The spread of Urtica dioica can be explained by the disturbance of military activities. Pilis-tető and its south and southwest slopes Ranges 13,17-19, 23, 25: The central part of Pilis-tető (ranges 17 and 25) is a military object. On the northeast slope of the northwest process of the peak beech forests can be found (13B). Outstanding floristical value is Allium ursinum (appr. 20 plants) in the vicinity of landmark 18. The connected Querco petraeaeCarpinetum forests (at the border of 13B and 19A) living on the top are forests on shallow soil with bare rocks. This and the partly Fraxinus dominated stands show deficiencies of earlier silviculture. Querco petraeae-Carpinetum forests transform into a Quercetum petraeae-cerris pannonicum forest as the peak goes on to a southwest low gradient slope (13A, 18A, 19A, 23B). These Quercetum petraeae-cerris pannonicum forests are situated extrazohally at the height of 700 m above see level. Its special location is also indicated by the relatively large number of Fagetalia elements in the herb layer that is dominated by Asperula odorata in some places. One part of them is also a degraded stand with full of Fraxinus trees. Such interesting transitional stands would be worth studying more detailed and the discussion with botanists would be necessary during the planning of forest management.