Amazing big Silurian fossil plant and two Cooksonia plants

Description

Amberabg
Two rare oldest Cooksonia fossils land plants and big 19x3mm amazing, undescribed plant
Species: Cooksonia sp.
Upper Silurian (Ludlowian/Pridolian) of the Holy Cross Mountains, Poland. Kielce region
Dimension: matrix 75x45mm, cooksonia 9mm and 6mm
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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