Progymnosperm

Progymnosperms are ancient plants that don't exist anymore. They were like woody plants with spores and probably came from trimerophytes.[1] Later, they led to the development of gymnosperms, which are the ancestors of acrogymnosperms and angiosperms (flowering plants). People sometimes call them Progymnospermophyta or Progymnospermopsida.

Progymnosperms
Middle Devonian – Lopingian
Archaeopteris fossil leaves
Scientific classification
Kingdom:
Plantae
Class:
†Progymnospermopsida

References

  1. ↑ Stewart WN, Rothwell GW (1993). Paleobiology and the evolution of plants. Cambridge University Press. p. 521pp.

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