Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 17. 1994. (Budapest, 1994)

Egerian flora. Its leaves are very common in Pomáz as well; together with the accessory element U. cf. minuta, it formed a riparian forest. THE CLIMATOLOGICAL EVALUATION OF THE FLORA Possessing enough data on a terrestrial flora, one can draw fairly correct conclusions concerning the paleoclimate. The paleoclimatological evaluation is best supported by a zonal vegetation, since the composition of this vegetation type is under zonal climatic control. The Pomáz flora, representing mainly the zonal vegetation type, meets this requirement. We used two basically different methods for the paleoclimatological evaluation. One is based on the climatic demands of the species, while the other considers only the leaf size (leaf statistics). As to the first method, the paleoclimate can be directly inferred from the vegetation type. Accordingly, the Late Oligocène Pomáz flora lived under rainy, subtropical climate. The high number of leaf specimens enabled us to perform leaf statistical investigations as well. Considering the experience of Dolph & Ditcher (1980), we applied the formula introduced by Cain & Castro (1959), and came to the following conclusions. From the 7 size domains, 4 are represented in our flora, namely the nanophyl, microphyl, notophyl and mesophyl domains; the bulk of the material, however, belongs to the mesophyl domain, similarly to the other Egerian floras of Hungary. nanophyl 0.25-2.25cm

2 microphyl 2.25-20.25cm

2 notophyl 20.25^l5.00cm

2 mesophyl 45.00-182.25cm

2 85.51% Fig. 45. Proportion of the nanophylous, microphylous, notophylous and mesophylous leaves in the flora of Pomáz