Ulmus fischeri HEER

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 : 64-65

Ulmus fischeri HEER

Pl. 11, Fig. 1–4

1856 Ulmus fischeri HEER , p. 57, pl. 57, fig. 1–3. 1961 cf. Ulmus braunii HEER var. plurinervia (UNGER) STANDFEST ; Knobloch, p. 270, pl. 1, fig. 3, 5.

1961 Zelkova ungeri KOVÁTS ; Knobloch, p. 270, pl. 1, fig. 2, pl. 7, fig. 4, 7.

Leaves shortly petiolate, lamina broadly ovate to ovate-elongate or oval, 13–45 mm long, 15–31 mm wide, simple or double dentate. Midrib straight, up to 11 secondary veins, straight to slightly bent, partly forked, tertiary veins perpendicular to secondary veins.

D i s c u s s i o n. Knobloch (1961) incorrectly assigned some coarsely simple dentate elm leaves to Zelkova which differs in having less densely spaced secondary veins. These simple dentate leaves fall into the normal variation of Ulmus fischeri foliage which is widely distributed in the Oligocene of the České středohoří Mountains (e.g. Bechlejovice – Kvaček and Walther 2004) and Saxony ( Walther and Kvaček 2007).

M a t e r i a l s t u d i e d: Leaf impressions, NM-G2804, NM-G2807, NM-G2808, NM-G2809, NM-G2855, NM-G2858, EK 287, some other fragments not numbered.