B. Papp szerk.: Studia Botanica Hungarica 39. 2008 (Budapest, 2008)

Bauer, N., Lőkös, L.; Papp, B.: Distribution and habitats of Cardaminopsis petraea in Hungary

locality is in the Buda Mts (Bia: Dobogó-hegy) where it was found by Gy. Timkó in 1917. The bryophyte assemblage of the studied quadrates consists of common species as Hypnum cupressiforme, Dicranum scoparium, Brachythecium rutabulum and Homalothecium sericeum. In the quadrates of Csobánc 11 -20, (on the ruins of the castle wall) some common species characteristic in anthropogenic habitats (Funaria hygrometrica, Tortula muralis) do also occur. Two hepatics collected in quadrates Csobánc 1-10 (Barbilophozia barbata, Frullania tamarisci) are indicator species of rocky places in good natural condition. In the Keszthely Mts, from where the largest number of proven occurrence data is known, we found the strongest stand of Cardaminopsis petraea on the side of Mt Varsás above Gyenesdiás, mainly on the north-facing wall of the great almost vertical rock. The bedrock of the locally named Kőmell is upper Triassic dolomite (Rezi Dolomite Formation) (BUDAI and SCHAREK 2005). Cardaminopsis petraea only occurs here on the rock wall and a few individuals in the Pinus nigra stand planted under the rock. On the wall Cardaminopsis petraea is accompanied by species typical in the north-facing shaded dolomite rocky grasslands (Festucopallenti-Brometum pannoniéi Zólyomi 1958) of the Transdanubian Mts (Festuca pallens, Bromus pannonicus var. reptans, Seseli leucospermum, Allium montanum, Phyteuma orbiculare, Thalictrum pseudominus, Viola collina, Leontodon incanus, etc.) (Table 2). The total cover of vegetation is rather low here because of the geomorphological conditions. Based on the coenological relevés the plant association developed on dolomite substrate of the Transdanubian Mts is significantly rich in relict species. This particular association can be regarded as a distinct "chasm grassland-character variant" or "rocky wall variant" of the above association (in which Cardaminopsis petraea and all of the recorded species are frequent, typical elements of the association). Regarding this we share the opinion of Zólyomi in FEKETE et al. (1961). Zólyomi also identified the habitat of Primula auricula occurring in rocky walls as a variant of closed dolomite rocky grasslands fragmentally developed on cliffs. On the dolomite area of the Keszthely Mts Aurinia saxatilis only survived on one spot (Keszthely-Cserszegtomaj: Csókakő) on barren rocky walls with similar vegetation.