Corylopsis sp.

Dedicated in memory of the late FrantiŠek Holý (1935 - 1984), an eminent Czech palaeobotanist, Holý, František, Kvaček, Zlatko & Teodoridis, Vasilis, 2012, A Review Of The Early Miocene Mastixioid Flora Of The Kristina Mine At Hrádek Nad Nisou In North Bohemia (The Czech Republic), Acta Musei Nationalis Pragae Series B 68 (3 - 4), pp. 53-118 : 68

Corylopsis sp.

Pl. 6, fig. 2

1977a Corylopsis sp. ; Holý, p. 112 (Hrádek/N., Kristina Mine).

Isolated seeds 4.1–5.5 mm long, 2.8–3.7 mm wide, broadly ovate to oval, rounded on top, base oblique with large roundish scar reaching to the lower third or half of the seed length, surface smooth, lustrous ( Holý 1975, pp. 36-7, pl. 6, figs 1-2).

D i s c u s s i o n: According to Holý (1975) the material seems to represent a new species similar in form to C. urselensis MÄDLER from Niederursel ( Mädler 1939) and Krościenko ( Szafer 1947) but the specimens are bigger and stouter. C. uralensis DOROFEEV (1970, pp. 50-51) looks to be very similar but also bigger, pointed at the apex.

M a t e r i a l: 4 seeds, G 4586, 4588, 8846.

Distylium SIEBOLD et ZUCC.

Distylium fergusonii E. KNOBLOCH et KVAČEK plexus

Pl. 2, figs 10-13, pl. 6, fig. 3, pl. 12, fig. 2

1976 Distylium fergusonii E. KNOBLOCH et KVAČEK , p. 45, pl. 17, figs 1, 3, 20, pl. 20, figs 1, 7, 13-14, text-fig. 18 (Wackersdorf).

1977a Distylium cf. uralense KOLESNIKOVA ; Holý, p. 112 (Hrádek/N., Kristina Mine).

2003 Distylium cf. uralense KOLESNIKOVA ; Teodoridis, p. 14, pl. 1, figs 20, 23-25 (Hrádek/N., drill cores).

Leaf fragments without preserved petiole, lamina incomplete, probably narrow elliptic to elliptic, 4–10 mm long and 2–7 mm wide, base widely cuneate, apex attenuate and blunt, margin entire, venation brochidodromous, midrib thick, secondary veins thinner, alternate, at angles of 50–80°, curved and looping at margin, intersecondaries thinner, obvious, tertiary veins alternate perpendicular, sinuous, venation of higher orders regular polygonal reticulate, areolation well developed, 4-sided, veinlets dichotomous branching. Adaxial epidermis strongly cutinized, smooth to partly faintly striate, non-modified cells polygonal to lobate, 25–40 µm in diameter, anticlinal walls regularly undulate, trichome bases star-like, mostly 30 µm in diameter, thickly cutinized, sparse, adaxial epidermis heavily striate, thickly cutinized, anticlinal walls of non-modified cells undulate, but mostly not discernible due to striation, stomata brachyparacytic, subsidiary cells wide, without clear distinct limits, guard cells pairs oval, 18–20 µm long and 12–18 µm wide, ledges thickened, bordering broadly oval pore. Trichome bases of the same kind as adaxially, but denser. Seeds narrow elongate, obovate, 6.9–7.4 mm long, 3.2 mm wide, with an elliptic oblique scar on base, smooth and a little lustrous on outer surface ( Holý 1975, p. 37, pl. 6, figs 3-4).

D i s c u s s i o n: Kvaček (1966) wrongly assigned these leaves from the Kristina Mine to Symplociphyllum sp. The abaxial epidermis clearly refers the material to Distylium fergusonii , which is, as elsewhere in Europe, also associated there with seeds assignable to Distylium uralense KOLESNIKOVA ( Holý 1975, 1977a, p. 112). Such seeds occurred, e.g., in Hartau, Wiesa, Sandförstgen ( Mai 1964, 1999b), in the drill cores from Hrádek/N. ( Teodoridis 2003) and at Köflach ( Meller et al. 1999). According to Mai and Walther (1991), D. uralense is correlated with the recent D. racemosum SIEBOLD et ZUCC. native to SE China.

M a t e r i a l: Isolated leaf compressions on slides, G 9166-9170 (KR 46, 70, 79, 331, 332, 464), three isolated seeds, G 4585-86, 4589.

Vitaceae JUSS.

Vitis L. Vitis lusatica CZECZOTT et SKIRGIEŁŁO

Pl. 6, figs 4-5

1959 Vitis lusatica CZECZOTT et SKIRGIEŁŁO in CZECZOTT et al., p. 193, pl. 17, figs 4-12 (Turów).

1977a Vitis lusatica CZECZOTT et SKIRGIEŁŁO ; Holý, p. 112 (Hrádek/N., Kristina Mine).

Seeds ovoid to obovoid, 4.6– 6 mm long, 3.2–3.7 mm wide, deeply incised on top, often obliquely cut, dorsal side with radial furrows, ventral side slightly convex, bearing a narrow keel (with fine raphe) and deep lateral parallel furrows, often with side tubercles, base rounded narrowing into cylindrical micropylar process ( Holý 1975, pp. 76-77, pl. 16, figs 3-6).

D i s c u s s i o n: According to Holý (1975) living relatives of Vitis lusatica are unknown. Seeds of V. glabra CHANDLER (1963, p. 103) from the Lower Eocene of England are very similar and it is also sometime difficult to distinguish Vitis lusatica from marginal forms of Tetrastigma chandlerae KIRCHHEIMER. The small seeds described by Teodoridis (2003, p. 23, pl. 5, fig. 22, pl. 6, fig. 12) as Vitis cf. teutonica AL. BR. from the drill cores near Hrádek/N. show morphological affinity to small specimens of V. lusatica known from the Zittau Basin in Poland ( Czeczott et al. 1959) and elsewhere in Saxony (e.g., Mai 1964, Czaja 2003).

M a t e r i a l: 25 seeds, several fragments, G 3052, 8838-39.