Folia Historico-Naturalia Musei Matraensis - A Mátra Múzeum Természetrajzi Közleményei 17. (1992)
Bužek, Č.–László, J.: Contribution to the Upper Pannonian flora from Visonta, northern Hungary
Description: Seed oval in outline, somewhat narrowed at the hilar end, flat, 2.23 mm long and 1.32 mm wide, with surface finely pitted; pits polygonal, 0.06 to 0.10 mm in diameter in the middle part of the seed, becoming somewhat smaller towards the seed ends; very small hilum elliptical, situated asymmetrically. Remarks: In Europe, the seeds have been recorded from the Miocene (SZAFER 1961, BÖ2EK and HOLY 1964, tANCUCKA-ÔROOONIOWA 1979, KNOBLOCH 1981b, Van der BURG 1907), Pliocene (REI0 and REI0 1915, REI0 1923, SZAFER 1938, 1947, KIRCHHEIMER 1957, GEISSERT 1961, Van der BURG 1983) and Pleistocene (REI0 and REIO 1907, SZAFER 1954). The seeds of Actinidia were also described from the Pannonian (KN0BL0CH 1976) and Pontian (KNOBLOCH 1981a) of southern Moravia. The present seed is very similar to some specimens described from Brunssum (e. g. by KIRCHHEIMER 1957). Material: 1 specimen. Inventorized under No BK-5515 APIACEAE Oenanthe sp . (PI. II, Figs. 14, 15): Description: Incomplete fruits, flattened, oval in outline, about 2 mm long, with 4 dark longitudinal stripes on the dorsal side. Remark:. The Tertiary fruits in question are usually identified with recent 0. aquatica LINK, and 0. lachenalii GMEL . (SZAFER 1954, MAI 1965). They were also described from the Pontian of southern Moravia (KNOBLOCH 1981a). Material: 1 Incomplete fruit and 1 specimen fallen into 3 pieces. Inventorized under No BK-5508. R0SACEAE cf. Prunus (Pl. VI. Flg. 5): Description: Dehiscent velve of evidently 2-velved, one-loculed, one-seeded endocarp (stone), either not or only less flattened, spindle-shaped, somewhat narrowed to the apex, about 4.5 mm long and 3 mm wide; external surface ornamented by the Incomplete longitudinal ribs; surface of locule Is smooth. Remarks: Such diagnostic features as the course of the funicular canal, the position of the stylar projection and attachment, however, not visible; remain of the thickened suturai line seems to be preserved at the margin and indicates the funicular margin of valve. Endocarp is tentatively assigned to Prunus. Endocarpe of Prunus padus L. have been described from the Pontian of southern Moravia (KNOBLOCH 1981a) which, however, have no common features with the present one. Material: 1 valve. Inventorized under Ne BK-5516 BETULACEAE Alnus sp. (PI III, Fig. 13, PI. V, Figs. 1-17, PI. VIII. Fig. 10): Description: Fragments of leaves, hypostomatic, very thinly cutinized; upper cuticle showing outlines of polygonal straight-walled cells Is about 15 to 20 Aim across; lower cuticle is very thin, bearing 4 to 5-celled thick basal parts of glands, cell walls hardly discernible; stomate anomocytlc (?), elliptic, 10 to 15 xjm broad and 18 (to 20) Aim long, showing slightly thickened outer ledges of guard cells recching the stomatal poles and forming spindle-like pore; female cones in different stages of development, usually very destroyed; torsos of mature cones with a few scales on the cone axis; cone remains indicate a size about 1.5 cm and show woody, compound, spirally inserted scales usually damaged or destroyed and preserved Just as stups or even scars; cone sceles up to 5 mm long and 5 mm wide at the distal end; inner surfece of scales striated with a few coarse ribs on the abaxlal side; male catkins (preserved only as fragments) In the compressed and deformed state, up to 5 mm wide, consisting of lerge rounded-triangular catkin scales, spirally arranged (their parastiches very well seen); each cover scale rimmed by 4 (2 pairs) small fused bracts and bracteoles at the margin; In the cross section (break) of compressed catkins and their fragments large number of anthers or pollen sacs with tetraporate (which are dominated) and pentaporate pollen grains were clearly recognizable. 56
