Betula buzekii KVAČEK et WALTHER

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

Betula buzekii KVAČEK et WALTHER

Pl. 15, Fig. 3–4

1961 Betula prisca ETTINGSHAUSEN ; Knobloch, p. 265, pl. 2, fig. 5, 7, pl. 5, fig. 1–13, pl. 10, fig. 11.

1998 Betula buzekii KVAČEK et WALTHER , p. 9, pl. 3, fig. 8–10, text-fig. 5, 13.1.

Leaves long petiolate, ovate to ovate elongate, ca 40 mm long and 25 mm wide, on the apex acute to acuminate, at base rounded to subcordate or slightly decurrent, margin simple to double serrate; midrib straight or slightly bent, secondary veins diverging at angles of (25–) 30–40 (–45)°, mostly opposite, 7–9, 3–5 mm apart, craspedodromous, tertiary veins slightly bent between secondary veins ( Knobloch 1961, as Betula prisca , emended).

D i s c u s s i o n. The prevailing birch foliage from Knížecí was assigned by Knobloch (1961) to Betula prisca ETTINGSHAUSEN. It corresponds well in gross leaf morphology to the newly established species B. buzekii KVAČEK et WALTHER (1998) based on another early Oligocene population from Kundratice.

M a t e r i a l s t u d i e d: Leaf impressions, NM-G2821, NM-G2822, NM-G2823, NM-G2838, NM-G2841, NM-G2842, NM-G2843, NM-G2844, NM-G2845, NM-G2846, NM-G2847, NM-G2848, NM-G2849, NM-G2882, NM-G2980, NM-G2982, NM-G2994, NM-G4839, NM-G4840, NM-G4841, EK 320–323, some more not numbered.