Alnus gaudinii (HEER) KNOBLOCH et KVAČEK

Kvaček, Zlatko, Teodoridis, Vasilis & Zajícová, Jana, 2015, Revision Of The Early Oligocene Flora Of Hrazený Hill (Formerly Pirskenberg) In Knížecí Near Šluknov, North Bohemia, Acta Musei Nationalis Pragae Series B 71 (1 - 2), pp. 55-102 : 67

Alnus gaudinii (HEER) KNOBLOCH et KVAČEK

Pl. 15, Fig. 5–7

1859 Rhamnus gaudinii HEER , p. 79, pl. 124, fig. 4–15, pl. 125, fig. 1, 7, 13.

1961? Pterocarya aff. denticulata (GÖPPERT) SCHLECHTENDAL ; Knobloch, p. 264, pl. 11, fig. 10.

1961 cf. Alnus kefersteinii (GÖPPERT) UNGER ; Knobloch, p. 267, pl. 2, fig. 9, 11.

1976 Alnus gaudinii (HEER) KNOBLOCH et KVAČEK , p. 33, pl. 6, fig. 1, 3, pl. 7, fig. 1, 5, pl. 13, fig. 4, pl. 15, fig. 1–4, 7–8, 10–11, 15, 17, pl. 16, fig. 1–5, pl. 19, fig. 15, pl. 20, fig. 10, text-fig. 11–12.

Leaves oblong to narrow ovate, incomplete in length, 23–30 mm wide, on margin simple serrate, teeth blunt, almost glandular, quite widely spaced, secondary veins eucamptodromous-semicraspedodromous, at angles of 30– 35°, partly looping, tertiary veins oblique or perpendicular, prominent, higher-order venation distinct.

D i s c u s s i o n. Knobloch (1961) compared some alder leaf impresions from Knížecí with Alnus kefersteinii , which is based on generative organs, and erroneously compared some leaf impressions with the Juglandaceae (as? Pterocarya aff. denticulata (GÖPPERT) SCHLECHTENDAL ). Similar foliage occurs e.g. at Kundratice, from where the epidermal structure has also been obtained ( Kvaček and Walther 1998).

M a t e r i a l s t u d i e d: Leaf impressions-compressions, NM-G8603a, b, EK 328–341.