Medullosa
Link between ferns and flowering plants.


Medullosa exited during the Carboniferous age about 300 million years ago. It was a small to medium tree with fern-like leaves that produced seeds and were called seed ferns. Living ferns produce spores but do not produce seeds.The evolutionary origin of seeds, with its embryo surounded by accumulated food reserves and a protective coat, provided a valuable means of adaptation to life on land.

 

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