Kovács I. (szerk.): A Magyar Természettudományi Múzeum évkönyve 78. (Budapest 1986)

Hably, L.: The macroflora of the borehole Kiscell-1 in Budapest

4.5 cm long ang 2 cm wide, while one of the D. bella remains described by RÁSKY was 7.5 cm long and 4 cm wide. Cercis hungarica RÁSKY (Pl. II : Fig. 4) Two specimens appeared from borehole Kiscell-1, one of them together with its ipmprint. The remains are very fragmented. On one of the remains apical part of a leaf can be observed and on the other one the middle part of a leaf can be seen with the venation on it. The proper size of the leaves cannot be measured but on the basis of the space and the angle between the veins a leaf of about 10 cm can be reconstructed. Two pairs of prominant veins branch out of the midrib from a single point at the base. The lower veins are almost horizontal, that is, they form an angle of 90° with the midrib while the upper veins enclose an angle of 45°. After a distance of about 3 cm secondary veins brach out of the midrib from different points, the distance of which is 0.1 cm. Other parts of the venation are covered by fine, mosaic-like fragments of organic matter in all remains. The margin of the leaf is entire. The apex at one of the specimen is obtuse. RÁSKY (1943) described the species from the Late Oligocène of Csillaghegy in Budapest, also based on leaf fragments. The size of the holotype is larger but their morphological features are the same. RÁSKY considered it to be closely related to the recent species Cercis canadensis. Cercis parvifolia LESQU. A 6 cm long and 4 cm wide specimen occurred at a depth of 30.9 m in borehole Kiscell1. The margin of the leaf is entire, the apex is missing. The basal part is very fragmented but its dissimilarities from the C. hungarica can clearly be observed. While the base of C. hungarica is cordate, no such projection can be observed for C. parvifolia. Thus the base is nearly acute. Its venation is similar to that of C. hungarica but it has no horizontal veins running to the projection at the base of the lamina. Newertheless we can see the predominant veins forming an angle of 45° with the midrib and the secondary veins branching out of the midrib after larger species. The secondary veins are camptodromous. The size of the space between the veins is smaller towards the axis. RÁSKY also mentions it from the Late Oligocène from Csillaghegy, together with C. hungarica. The remains which were found at Csillaghegy are a bit larger than those under investigation, but the typical specimens are considerably smaller than the remains from Csillaghegy. Though the epidermis is preserved in the specimen, it is so thin and fragmented that further preparation is impossible. RHAMNACEAE Zizyphus zizyphoidcs (TJNG.) WLD. (Pl. I: Fig. 2) Only one specimen was found at a depth of 35.5 m in the core. It become clear studying the other localities that it is more common in Tard Clay (HABLY 1979). The entire length of the leaf is 6.5 cm, its width is 2 cm. The lamina is asymmetrical, the margin is irregularly indented and wavy. The lamina is oblong and its widest part is somewhat above the medial line. The apex is missing. Two stout secondary veins appear along the midrib, running somewhat closer to the margin than to the midrib. Other parts of the venation cannot be observed because of the presence of organic materials. The species can be found either in the Middle Eocene of Trans-Danubia (HABLY 1985b), or in several Late Oligocène localities (RÁSKY 1956, HABLY 1979). Accordingly it survived trough the Eocene-Oligocene boundary, and became extinct only in the Late Oligocène. The plant occurs in the Late Oligocène of Méra in a similar association than in the Tard Clay. CAPRIFOLIACEAE Abelia quadrialata REID. et CHANDL. (Pl. I: Fig. 3, Pl. II: Fig. 2) ANDREÁNSZKY (1959) mentions this genus from several localities in Tard Clay, eg. Budaújlak and Kiseged. REID & CHANDLER (1926) also described it from the Late Oligocène from Bembridge flora, under the name of Abelia quadrialata. It was found in the boreholes marked H in Óbuda, also from Late Oligocène (HABLY 1979). Two very well preserved imprints were found at depths of 20.4 and 48.4 m in borehole Kiscell-1. In its main characters the one found at 48.4 m is very similar to the remains found earlier. It consists of four heavily oblonged, obovate petals, two of them close together, and the other two are far from each other, thus showing zygomorph symmetry. The maximum width of the petals is 0.3 cm. On the earlier remains radial symmetry can be observed, moreover, ANDRE-