Cooksonia - Museum quality, beautiful oldest Silurian land plants

Description

Amberabg
Museum quality specimen. Beautiful, big oldest Silurian fossils land plants with sporangium
Species: Cooksonia sp.
Upper Silurian (Ludlowian/Pridolian) of the Holy Cross Mountains, Poland. Kielce region
Dimension: matrix 40x35mm Cooksonia 21mm and 17mm
The first fossil records of vascular plants, that is, land plants with tissues that carry food, appeared in the second half of the Silurian period. The earliest known representatives of this group are the Cooksonia (mostly from the northern hemisphere) and Baragwanathia (from Australia). A primitive Silurian land plant with xylem and phloem but no differentiation in root, stem or leaf, was much-branched Psilophyton. This plant reproducied by spores and respired through stomata on every surface, and probably photosynthesizing in every tissue exposed to light.
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