Betula buzekii

Name

Betula buzekii

Rank

Species

Generic Name

[Genus] Betula

Authors (Pub.)

Kvaček Z. Walther H.  

Publication

The Oligocene volcanic flora of Kundratice near Litoměřice, České Středohoří volcanic complex (Czech Republic): a review [1998/6]

Journal

Sborník Národního Muzea v Praze

Volume

54

Issue

1-2

Page number

9

Year

1998

Fossil Status

leaves

Stratigraphy

Oligocene

Location

Kundratice near Litoměřice, České Středohoří Mts, Ústecký kraj, Czech republic

Paleoregion

Eurasia (Europe)

Data for Holotypus

Repository

Charles University, Prague, Czech Republic

Repository Number

CKU 143

Num

3: 9

Pub.

The Oligocene volcanic flora of Kundratice near Litoměřice, České Středohoří volcanic complex (Czech Republic): a review [1998/6]

Diagnosis

Leaves simple , ovate, petiolate, mostly 22-32 mm wide and 37-55mm long,widely cuneate at the base,slightly apiculate , apex acute. Margin double serrate, teeth triangular, biconvex with extended tips.Venation craspedodrome, midrib straight to slightly bent, secondaries straight, subopposite , in 7-8 pairs. Cuticle medium thick. Abaxial epidermis smooth, compound of polygonal cells 20-30 pm across with straight anticlines. On the midvein simple hair-basis with roundish to oval outline , c. 6 x17 pm in size . Abaxial epidermis more cutinized. Ordinary cells polygonal , variable in size, 12-30pm across with straight to slightly bent anticlines. Stomata anomocytic (to laterocytic), with periphery on lateral cells radially strongly striate to rugulose. Guard cell pairs narrow elliptic 7-15p m wide and 17-32 pm long. Aperture spindleshaped, narrow, reaching almost to the stomatal poles. Rare or sparce roundish rema ins of peltate glandular hairs c. 75 , Lim across with polycellular bases, mainly on veinlets. On thicker veins simple hair bases c. 10pm across.