L. Lőkös szerk.: Studia Botanica Hungarica 26. 1995 (Budapest, 1995)

Dobolyi, Konstantin Z.: Phytosociological studies of the habitat of Achillea ochroleuca Ehrh. on Szamár-hegy (Visegrád Mts, Hungary)

Similarity Fig. 1. Dendrogram of the relevés taken at the habitat of Achillea ochroleuca. The similarity matrix was calculated by the Czekanowski's function. The classification was performed by the SYN-TAX program package (PODANI 1988) of this site. The average nature protection value (calculated according to BORHIDI 1993) is 3.46. The distribution of the ecological indicator values correspond to the environmental circumstances: dry and warm microclimate, basic and nitrogen-poor soil. The extreme climatic character of these grasslands are also expressed by the ratio of species reflecting continentality (Table 7).