23. Vascular Plants Without Seeds

Concepts
Early Vascular Plants

• Rhyniophytes
  • Xylem Structure of Early Vascular Plants
  • Life Cycles of Early Vascular Plants
• Zosterophyllophytes

Psilotum

• Division Psilotophyta

The Microphyll Line of Evolution: Division Lycophyta

• Morphology
• Heterospory
• Extant Genera

The Megaphyll Line of Evolution

• Division Trimerophytophyta
• Origin of Megaphylls
• Division Arthrophyta
• Division Pteridophyta
  • Eusporangia and Leptosporangia

Botany and Beyond: Molecular Studies of the Evolution of Early Land Plants
Botany and Beyond: Form Genera