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

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

preferring semi-shaded areas (THORN 1958, BORHIDI 1995, HEMP 1996, CERNY et al. 2006). HEMP ( 1996) demonstrated the photophilous character of the Cardaminopsietum petraeae chasm-grassland - through the comparison of Cystopteridetum, Asplenietum and Cardaminopsietum. According to ELLENBERG (1996) - in the alpine region -Cardaminopsispetraea is the species of sunny limestone rocks and stone walls (Potentillion caulescentis), and can be found on south-facing chasms and rock ledges. Its relict populations exist in several middle mountainous areas in Central Europe (HOHENESTER 1960, POLATSCHEK 1966, MlLBRANDT 1976, CERNY etal. 2006), mainly in north-facing locations (CERNY et al. 2006). This is also true for the Hungarian stands; in the submountainous region relict populations of montane, photophilous species (e.g. Primula auricula, Saxifragapaniculata) as well as C. petraea share similar habitat preferences and find their optimal environment in humid (mainly partly shaded) microclimatic recesses. Shown by a number of references, there is obvious disagreement in its coenological preferences. For example (with reference of the association), JÁVORRA and SOÓ (1951) and CHYTRY and TlCHY (2003) - SeslerioFestucion; SOÓ (1968) and BORHIDI (1995) - Bromo-Festucion pallentis; BRANDES (1992) - Asplenietea Class; POTT (1995) - Potentilletalia caulescentis ordo within Asplenietea. ELLENBERG (1996) treats it as a character species of the Potentillion caulescentis-serial. [It should be noted here that "Cardaminopsis petraea" on the 90th diagram of POTT (1995) is in fact Hornungiapetraea (L.) Rchb.]. Cardaminopsis petraea is the denominating species of several plant associations [e.g. "Cardaminopsietum petraeae Thorn 1958" (THORN 1958, POTT 1995), "Arenaria norvegica-Cardaminopsis petraea-soc." (SPENCE 1970)]. SCHUHWERK (1990) designated the lectotype of "Cardaminopsietum petraeae Thorn 58", however he deleted the relevés relating to the earlier described Asplenio trichomano-rutae-murariae a.nd Asplenio-Cystopteridetum from the association definition summarised in the name of Cardaminopsietum petraeae by Thorn. According to SCHUHWERK (1990) Cardaminopsis petraea (and other relict species from the Fränkischen Jura rock vegetation) belongs to the relict alternations of the above-mentioned associations, as well as to the "Sesleria albicans Gesellschaft". Other authors also pointed out occurrences of several other, mainly rocky plant associations: "Bromo-Seslerietum" (GAUCKLER 1938), "Sesleria grasslands" (MEUSEL 1939),