Betula plioplatyptera

Name

Betula plioplatyptera

Rank

Species

Generic Name

[Genus] Betula

Authors (Pub.)

Hummel A.  

Publication

The Pliocene leaf flora from Ruszów near Żary in Lower Silesia, South-West Poland. Part II (Betulaceae) [1991]

Journal

Acta Palaeobotanica

Volume

31

Issue

1-2

Page number

82

Year

1991

Fossil Status

leaves

Stratigraphy

Pliocene

Strat. comment

Gozdnica Series

Location

Ruszów, Jelenia Góra Voivodship, Poland

Paleoregion

Eurasia (Europe)

Data for Holotypus

Repository

Muzeum Ziemi, Polish Academy of Sciences, Warsaw, Poland

Repository Number

Specimen No MZ. VII/67/0/26

Num

Pl. 3, fig. 1, 1 a; Fig. 6: 1, 1 a

Pub.

The Pliocene leaf flora from Ruszów near Żary in Lower Silesia, South-West Poland. Part II (Betulaceae) [1991]

Data for Paratypus

Repository

Muzeum Ziemi, Polish Academy of Sciences, Warsaw, Poland

Repository Number

Specimen No MZ. VII/67/0/24

Num

Pl. 4, fig. 1, Ia, Pl. 5, fig. 2-4; Fig. 6: 2, 20

Pub.

The Pliocene leaf flora from Ruszów near Żary in Lower Silesia, South-West Poland. Part II (Betulaceae) [1991]

Diagnosis

Leaves elliptic or slightly elliptic-ovate, base cuneate. Leaf margins at the base entire, higher up distinctly doubly serrate. Venation craspedodromous. The lowermost pair of secondary veins running parallely to leaf base. Tertiary veins percurrent, irregular. Cells of upper and lower epidermis isodiametric or slightly elongated, their anticlinal walls straight or rounded. Stomatal apparatus anomocytic. Stomata elliptic or oblong. Only outer stomatal ledges surrounding spindle-shaped or oblong outer stomatal ledge aperture are thicker. Trichome bases of two types: multicellular and unicellular.