Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 56. (Budapest 1964)
Rásky, K.: Studies of Tertiary plant remains from Hungary
Eocene marl of Budapest —Óbuda. These fragmentary specimens are difficult to identify, since similar fragments might have originated from Pueraria, Dolichos, Dombeyopsis, Pawlownia, Euphorbiaceae, etc. leaves, too. Since there occur several species common for the Upper Eocene of the Buda marl and the Rupelian of the Kiscell clay, there is a possibility that also these fragments belong to the Malvaceophyllum leaves. 4. Budapest-Óbuda, Upper Eocene Osmunda palaeobanksiaef olia n. nov. (Plate VII, Figs. 10—11) Description: Fern frond fragments. The length of the elongated leaflet is 8 cm, width 0.8 cm. The apex is gradually and finely attenuate. The margin is coarsely toothed; the teeth gradually disappear toward the apex, and the margin becomes undulated. The other specimen is a fragment near the base of the frond; the teeth are blunt and larger on the margins. The length of the fragment is 2.5 cm, width 0.8 cm. The midrib of the pinnules is relatively thick, graFig. 5. Kydia palaeocalycina RÁSKY, Budapest-Obuda, Middle Oligocène, x 1 / 2 . Coll. nr. 63. 1052. 1 - Fig. 6. Kydia palaeocalycina RÁSKY, Budapest-Obuda, Upper Eocene, X 1 /^ Coll. nr. 60. 31.1 dually tapering toward the apex. The lateral veins, arising on both sides from the midrib, are generally arranged into groups of three. The lower and the upper veins bifurcate and pass to the margins. The lower, bifurcating vein arises separately from the midrib, but the upper bifurcate vein originates, near the midrib, from the median and ramifying group. The number of veins of the median ramifying group varies between 6—8 in the lower and median sections of the pinnule, gradually decreasing and simplifying toward the apex, where the dentate margin also smooths out to become almost entire. The three major branches of the lateral veins extend, along the margin, from the small sinus above the teeth to the next sinus.
