Progymnospermophyta.html |
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"Progymnospermopsida" redirects here. For other uses, see Progymnospermopsida (disambiguation).
| Progymnospermophyta Fossil range: Middle Devonian to Mississipian |
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Progymnospermophyta is an extinct division of Paleozoic plants.
Characteristics
- Vascular cambium with unlimited growth potential is present as well as xylem and phloem.
- Ancestors of the earliest seed plants as well as the first true trees.
- Superficially conifer/spruce-like in appearance.
- Strong monopodial growth is exhibited.
- Macrophylls present as well as simple leaves.
- Some were heterosporous but others were homosporous.