Cercidiphyllum SIEBOLD et ZUCCARINI

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 : 62-63

Cercidiphyllum SIEBOLD et ZUCCARINI Cercidiphyllum crenatum (UNGER) R. BROWN

Pl. 7, Fig. 8–9

1850 Dombeyopsis crenata UNGER , p. 448.

1935 Cercidiphyllum crenatum (UNGER) R. BROWN , p. 575, pl. 68, fig. 1, 6, 8–10.

1961 Cercidiphyllum crenatum (UNGER) R. BROWN ; Knobloch, p. 274, pl. 15, fig. 1, 3, 4, 11.

Leaves of Cercidiphyllum were characterized by Knobloch (1958, translation from Czech) as follows: “Leaf blade cordate to elliptical, widest in the lower half. Leaf margin crenulate, base cordate to rounded. 1–3 basal veins run on either side of the main vein. They are broken in places, where other veins emerge. A row of thinner veins start from basal veins and run towards the leaf margin, they loop and send veinlets into marginal teeth. Tertiary venation consists of variously sized fields”. Leaf blades attain 30 to 64 mm in length and 21 to ca. 50 mm in width.

D i s c u s s i o n. The typical variation in leaf form from narrower elliptical to rounded and broadly cordate is developed in the plant assemblage of Knížecí in the same way as in some other records of this species in the České středohoří Mountains, e.g. at Bechlejovice ( Kvaček and Walther 2004).

M a t e r i a l s t u d i e d: Leaf impressions, NM-G8580,

NM-G8595, NM-G8599, NM-G11492, EK 264–266.