Gymnosperms (cone-bearing plants) first appeared in the Pennsylvanian period, approximately 319 million years ago (Ma).

Authors

• Person: Not available Organization: LibreTexts
  5.9.1: Kingdom Plantae - Evolution and Phylogeny

Sources

• 5.9.1: Kingdom Plantae - Evolution and Phylogeny bio.libretexts.org LibreTexts via serper

Referenced by nodes (1)

• Gymnosperms concept