Description: Specimen: Leafy twigs of rarer coal age lycopod Bergeria dilatata Lindey & HuttonLocality: Poland, GZW Upper Silesia Coal Basin, Stratigraphy: Upper Carboniferous – Pennsylvanian - Westphalian B - Orzeskie BedsMatrix dimensions: ca. 10,0 x 8,0 x 1,0 cmRarer lycopod genus leafy twigs of Bergeria dilatata Lindey & Hutton ! Bergeria like it’s cousin plant Lepidodendron (also known as the "Scale tree") is an extinct genus of primitive, vascular, arborescent (tree-like) plant related to the Lycopsids (club mosses). It was part of the coal forest flora. They sometimes reached heights of over 30 metres (100 ft), and the trunks were often over 1 m (3.3 ft) in diameter, and thrived during the Carboniferous period. Sometimes called "giant club mosses", this is actually not correct as they are actually closer to quillworts than to club mosses. The closely packed diamond-shaped leaf scars left on the trunk and stems as the plant grew provide some of the most interesting and common fossils in Carboniferous shales and accompanying coal deposits. These fossils look much like tire tracks or alligator skin. The scars, or leaf cushions, were composed of green photosynthetic tissue, evidenced by the cuticle covering and being dotted with stomata, microscopic pores through which carbon dioxide from the air diffuses into plants. Likewise, the trunks of Lepidodendron would have been green, unlike modern trees which have scaly, non-photosynthetic brown or gray bark. Bergeria has been likened to a giant herb. The trunks produced very little, if any, wood. Most structural support came from a thick, bark-like region. This region remained around the trunk as a rigid layer that did not flake off like that of most modern trees. As the tree grew, the leaf cushions expanded to accommodate the increasing width of the trunk. The branches of this plant ended in cone-like structures. Systematic:Division: Tracheophyta (Lycoposida)Class: LycopodinaeOrder: LycophodialesFamily: LepidodendraceaeGenus: BergeriaSpecies: Bergeria dilatata Lindey & Hutton
Price: 19 USD
Location: Orzesze
End Time: 2024-10-10T17:12:33.000Z
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