Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 54. (Budapest 1962)
Rásky, K.: Tertiary plant remains from Hungary (Upper Eocene and Middle Oligocene)
HOLLICK compared (1936, p. 147-148, Pt. 87, Fig. 1) the leaf of the species described as Grewiopsis grandiculus from the Paleocene flora of Alaska also with the French Grewiopsis credneriaeformis (SAP.) SAP., and pointed out the possibility that they might be variable leaves of the identical species, but did not synonymize the two taxa. The shape of the lamina and the venation of the leaf of Ficus grönlandi HEER described from the Paleocene flora of Greenland might also be compared with that of Sloaneaephyllum grambasti, but, on the defective margin of HEER'S Ficus grönlandi, there are visible only three spine-like outgrowths and not a dentation (HEER, 1868, p. 123, Taf. 49, Fig. 8). The leaves cannot be identified with Sloaneaephyllum grambasti. The configuration of both the secondary and tertiary veins on the leaves of Celastrus preangulata described by MACGINITIE (1941, p. 140, Pt. 34 and Pt. 35, Fig. 3) from the Middle Eocene of the Sierra Nevada deviates considerably from that of Sloaneaephyllum grambasti. The general characters of the Alaskan and French Grewiopsis leaves are similar to and also resemble the leaf remains of Sloaneaephyllum grambasti from Óbuda, but their identification is impossible without the comparison of the original specimens. One might find leaves associable with those of Sloaneaephyllum grambasti also among the ones described as Pterospermites spectabilis HEER (HEER, 1883, p. 125, Taf. 81, Fig. 3, and 1874, p. 21, Taf. 3, Fig. 17), but these very leaves show considerable differences even among each other, and they also deviate from the leaves described under the same name by HOLLICK from the Paleocene flora of Alaska (HOLLICK, 1936, p. 150-151, Pt. 87, Fig. 2, Pt. 88, Fig. 2 and Pt. 89, Figs. 2-3). SCHLOEMER— JÄGER recently described leaf remains with entire margins by the name Pterospermites spectabilis HEER from the Paleocene flora of W. Greenland (SCHLOEMER— JÄGER, 1958, p. 82, Taf. 13, Fig. 5 — 6), but the author herself considers it highly doubtful whether the leaves specified as Pterospermites spectabilis HEER could be relegated at all to the family Sterculiaceae, — a problem HEER himself alluded to. (A part of the leaves with entire margins are similar to leaves relegated to the genus Apeibopsis of the family Tiliaceae). ft From the Tertiary flora of Alaska, HOLLICK published two leaf fragments by the name Acer inequale HEER (HOLLICK, 1936, p. 135, Pt. 77, Figs. 2—3), of which Fig. 2 resembles the leaf finds from Óbuda. Of these remains, HEER himself had already remarked (1876, p. 89) that their association with the genus Acer is doubtful. Owing to their fragmentary state, also HOLLICK left them in the genus Acer. However, HOLLICK'S specimen depicted on Pt. 77, Fig. 2 should probably be allocated to the genus Sloaneaephyllum. Comparison with recent species: The leaf remains of Sloaneaephyllum grambasti are well comparable with the leaves of the recent Sloanea massoni Sw. of the Caribbean Islands. The leaves of the recent Sloanea massoni Sw. are furnished with small teeth on the basis of the leaf margin^ with also blunter and larger teeth on the side of the lamina, whilst the margin is locally (for a length of several centimeters) entire or undulate. The secondary veins of the recent leaf are camptodrome. Sloaneaephyllum obudaense n. sp. (Plate IV, Figs. 2-3) Derivation of specific name: after the locality. Holotype : the specimen shown on Plate IV, Fig. 3, and its counterpart on Plate IV, Fig. 2. In the Paleofcotanical Collection of the Botanical Department of the Hungarian Natural History Museum, Budapest. Collect, nr. 62. 77. 1. and nr. 62.919. 1. Paratype: 1 leaf, impression and counterpart. Collect, nr. 62.918. 1. and 62. 919. 1.
