Kvaček, Zlatko, Teodoridis, Vasilis & Radoň, Miroslav, 2018, Review Of The Late Oligocene Flora Of Matrý Near Sebuzín (České Středohoří Mts., The Czech Republic), Fossil Imprint 74 (3 - 4), pp. 292-316 : 298-299

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Alnus sp.

Pl. 8, Figs 1–3

? 1971 Alnus sp.; Bůžek, p. 48, pl. 13, fig. 13, pl. 15, figs 1–6. 2009 Alnus gaudinii (HEER) ERW.KNOBLOCH et KVAČEK;

Akhmetiev et al., p. 117.

M a t e r i a l s t u d i e d. PA 1172.4, 1403, 1404, 1423,

1436, 1578, 1579.1.

D e s c r i p t i o n. The leaves are oblong elongate, petiolate, with fine denticulate margin.

D i s c u s s i o n. These morphotypes are associated with the above larger leaf forms and may represent only smaller variants of Alnus rhenana. A resolution of its position cannot be made without epidermal studies. Similar leaf forms also occur in the Oligocene site Valeč in the Doupovské hory Mts., where they are associated with alder infructescences described as Steinhauera oblonga C.PRESL in STERNB. (J. Kvaček and Straková 1997: 111, pl. 40, fig. 4).

Alnus cf. kefersteinii (GÖPP.) UNGER Pl. 7, Fig. 10

? 1836 Alnites kefersteinii GÖPP., p. 564–566, pl. 41, figs 1–5, 15– 16, 18.

? 1845 Alnus kefersteinii (GÖPP.) UNGER, p. 78.

2009 Alnus kefersteinii (GÖPP.) UNGER; Akhmetiev et al., p. 117.

M a t e r i a l s t u d i e d. PA1161.1–2, 1444.1, 1576.

D e s c r i p t i o n. Ovoid and strongly compressed infructescences.

D i s c u s s i o n. The material at hand is very poorly preserved. Only its overall form allows identifying it as alder female infructescences. The association with foliage of Alnus rhenana suggests that both organs may belong to the same plant element.