B. Papp szerk.: Studia Botanica Hungarica 39. 2008 (Budapest, 2008)
Dobolyi, K., Erős-Honti, J.; Botta-Dukát, Z.: Habitat preference of Linum dolomiticum (Linaceae)
Studia bot. hung. 39, pp. 139-148, 2008 HABITAT PREFERENCE OF LINUM DOLOMITICUM (LINACEAE) K. DOBOLYI 1 ,]. ERŐS-HONTI 2 and Z. BOTTA-DUKÁT 3 department of Botany, Hungarian Natural History Museum H1476Budapest, Pf.222, Hungary; dobolyi@bot.nhmus.hu 2 Department of Plant Taxonomy and Ecology, Eötvös Loránd University of Sciences H1117 Budapest, Pázmány Péter sétány 1/c, Hungary; ehjulianna@yahoo.com ^Institute of Ecology and Botany, Hungarian Academy of Sciences H-2163 Vácrátót, Alkotmány u. 2-4, Hungary; bdz@botanika.hu Vegetation of the total distribution area of Linum dolomiticum was analysed based on 277 phytosociological relevés. After noise elimination by metric multidimensional scaling, relevés were clustered into five groups by Ward's algorithm. The relevé groups were characterised by faithful, constant and dominant species and analysed on the basis of the following species characteristics: phytogeographical area (floral element), phytosociological character, social behaviour type, water and continentality preference categories. Testing the association between Linum dolomiticum and other species the u hyp statistics was calculated. With 5 tables. Key words: dolomite rock grasslands, fidelity, Linum dolomiticum, phytosociology INTRODUCTION Linum dolomiticum Borbás (Linaceae) is an endemic, pre-glacial relic plant species of Hungary. The distribution of this species is extremely narrow: it lives only on dolomite hills in a region of one square kilometre in Buda Hills near Pilisszentiván (47° 36' N, 18° 52' E). It has one population only, consisting several stands separated by closed deciduous forest. MÉSZÁROS-DRASKOVITS (1967) and DOBOLYI (2003, 2005) carried out phytosociological studies and multivariate analysis of the habitat of Linum dolomiticum in order to determine and characterise the vegetation types of the habitat. 135 relevés were included in those earlier investigations; all of them were marked out so that Linum dolomiticum is present in all relevés. Results of these studies revealed that Linum dolomiticum occurs mostly in open and closed dolomite grasslands, in the herb layer of open
