Psilophyton

Psilophyton refers to a genus of small, herbaceous Paleozoic plants that are now extinct. These plants are significant because they represent some of the earliest known land plants with vascular tissue, appearing in the Late Silurian period.12

Psilophyton plants lacked true leaves and roots, instead featuring underground rhizomes and sporangia at the tips of their stems. They are part of the division Psilophyta, which are considered the most primitive group of pteridophytes (seedless vascular plants). While Psilophyton itself is extinct, this group of plants is crucial for understanding the early evolution of land flora.1234