Forest
The first forests on Earth were about 380 million years ago), in the later Devonian period. Archaeopteris grew to about 10 meters tall (33 feet). The plant was rather fern-like, with deciduous fronds which dropped onto the forest floor. Streams running through the forest picked up fronds, which perhaps stimulated freshwater fishes. Wattieza was an even earlier plant which has been claimed as the "first tree". They were also fern-like, reproduced with spores and grew in groups together.