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 | |
|---|---|
| File:Archaeopteris.JPG | |
| Archaeopteris fossil leaves | |
| Scientific classification | |
| Kingdom: | |
| Class: | †Progymnospermopsida
|
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References[change]
- ↑ Stewart WN, Rothwell GW (1993). Paleobiology and the evolution of plants. Cambridge University Press. p. 521pp.
Other websites[change]
- Progymnospermophyta Archived 2015-04-02 at the Wayback Machine
- Botany: an introduction to plant biology
