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Home » Study of the Permian tropical forest at Inner Mongolia, China » One of the most important specimen of more than a meter long axis of pteridosperm fern with reproduc » One of the most important specimen of more than a meter long axis of pteridosperm fern with reproduc

One of the most important specimen of more than a meter long axis of pteridosperm fern with reproduc

One of the most important specimen of more than a meter long axis of pteridosperm fern with reproductive organs at the base and sterile fronds at the apex

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