3: Origin of Trees & Forests
Origin of Trees; Rise of Forests (385-275 Ma)
Plant groups covered in class
Progymnosperms † (spore-bearing, woody trees)
Lepidodendron † (Scale trees)
Ferns and fern-like plants
Calamites † and Equisetum
Extended Learning - Groups Not Covered in Class
Questions for Thought
Why was the developmental control of apical cell branching crucial to land plant evolution?
What advantages did early clubmosses have over rhyniophytes?
What advantages did trimerophytes have over rhyniophytes?
How was the growth of the Lepidodendrids important to the formation of fossil fuels?
What are the strengths and weaknesses of the Telome Concept?
How are horsetails from the Carboniferous and modern day similar and different?.
Plants may be the cause for the Late Devonian extinction event. Explain how.