B. Papp szerk.: Studia Botanica Hungarica 32. 2001 (Budapest, 2001)

Dobolyi, Konstantin: Phytosociological and ecological evaluation of selected habitats of Telekia speciosa (Schreb.) Baumg. (Asteraceae)

flora. The general concept and the scales follow ELLENBERG et al. (1991), so the two systems are compatible.) The values of features characterizing the sample groups were calculated according to percentage pro rata of plant mass (DOBOLYI 1992). Abbreviations of the names of plant species follow the "MEMO" field in HORVÁTH et al. (1995). RESULTS Results of classifications The multivariate analyses uncovered the structure of the data matrices, the distances of relevés and their groups. Comparison of classifications of "matrix A" (based on the floral composition) and "matrix B" (based on the phytosociological character) provides the following results: 1 ) Classifications of "matrix B" give much more homogeneous groups than "matrix A". 2) The dendrograms obtained by the different methods are more similar to each other in the case of "matrix B" than "matrix A". 3) The clusters obtained by the same methods are connected at lower dissimilarity values in the case of "matrix B" than "matrix A". The different methods for classifications provide varied and different results. Among the numerous methods the global optimizing with Bray-Curtis coefficient has provided the most relevant classifications (Figs 1-2). The dendrograms of Fig. 1. Dendrogram of "matrix A", global optimization, Bray-Curtis.