Cooksonia cf pertoni - Museum quality Silurian oldest land plant with sporangium

Description

Amberabg
Museum quality fossil specimen. Big rare, very well preserved oldest fossil land plant with sporangium.
Species: Cooksonia cf. pertoni Rogerson 2002
Upper Silurian (Ludlowian/Pridolian) of the Holy Cross Mountains, Poland. Kielce region
Dimension: matrix 26x19mm, plants 12mm
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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