Oleinites hallbaueri (MAI) SACHSE

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 : 71

Oleinites hallbaueri (MAI) SACHSE

Pl. 6, Fig. 8, Pl. 19, Fig. 5–7

1885 Carya elaenoides UNGER ; Engelhardt, p. 67, pl. 25, fig. 1–4.

1961 Myrica lignitum (UNGER) SAPORTA ; Knobloch, p. 256, pro parte, pl. 3, fig. 1–2.

1961 cf. Ilex rottensis WEYLAND ; Knobloch, p. 282, pl. 13, fig. 10.

1963 Myrica hallbaueri MAI , p. 46, pl. 2, fig. 4–6, text-fig. 3a.

2001 Oleinites hallbaueri (MAI) SACHSE , p. 319, pl. 2, fig. 8–9.

Leaves elongate, up to 142 mm long and 65 mm wide, widely coarsely dentate, acuminate at the apex, rounded at the base, venation semicraspedodromous, midrib straight. Secondary veins regularly spaced, at wide angles, at the ends abruptly looping, and sending side veinlet into the teeth. Simple intersecondaries occasionally present, tertiary venation very fine, forming irregular fields. The cuticle structure poorly preserved, showing straight-walled cells on the adaxial epidermis and peltate trichomes with unicellular base, which is reflected in the outline as a double line.

D i s c u s s i o n. Knobloch (1961) merged this morpho-type with Myrica lignitum but stressed the heterogeneity of this species in his concept. Mai (1963) separated it as a new species of Myrica . Later studies of the epidermal anatomy ( Sachse 2001) confirmed the affinity to the Oleaceae and not to the Myricaceae . Our structure of the peltate trichomes from specimen NM-G2812 matches the pattern found on the holotype ( Bůžek et al. 1976).

M a t e r i a l s t u d i e d: Leaf impressions, NM-G2812, NM-G2828, NM-G2832, NM-G4859a, b, NM-G8602, EK 381–382, more specimens not numbered.