COOKSONIA:
Cooksonia is a genus of extinct plants that are considered among the earliest known vascular plants. These plants existed during the Silurian period, which spanned from approximately 443 million to 419 million years ago. Cooksonia is significant in the history of plant evolution because it represents a transition from non-vascular plants (those lacking specialized tissues for conducting water and nutrients) to vascular plants (those with specialized tissues like xylem and phloem).Its presence in the fossil record helps scientists understand the transition from non-vascular to vascular plants and the broader evolution of terrestrial ecosystems.
