Here's a simplified timeline:
1. Non-vascular plants: The earliest plants, like mosses and liverworts, appeared around 470 million years ago. They didn't have vascular systems (like roots and stems) to transport water and nutrients.
2. Seedless vascular plants: Around 425 million years ago, plants evolved vascular systems and started to grow taller. Examples include ferns and horsetails.
3. Seed plants: Around 360 million years ago, seed plants evolved. They developed seeds, which allowed them to reproduce more effectively and disperse to new environments.
4. Gymnosperms: These seed plants, like conifers, cycads, and ginkgoes, appeared around 300 million years ago. Their seeds are not enclosed in fruits.
5. Angiosperms (Flowering Plants): Around 140 million years ago, flowering plants evolved from gymnosperms. They developed flowers, which are specialized structures for attracting pollinators and protecting seeds.
So, while flowering plants (angiosperms) are a relatively recent development, they evolved from earlier seed plants, making seed plants the ancestor of flowering plants.
