Ancient plants are the early forms of vegetation that existed millions of years ago, long before modern flora appeared. These plants include ferns, mosses, and cycads, which thrived in various environments. They played a crucial role in shaping Earth's ecosystems and contributed to the formation of coal deposits. Some ancient plants, like ginkgo biloba, still exist today, providing insights into the evolution of plant life. Fossils of ancient plants help scientists understand climate changes and the development of habitats over time. Studying these plants reveals the rich history of life on Earth and its ongoing transformation.