How to recognise them
Frond-like leaves similar to a fern.
Multiple species of fossil ferns have been found at Kiltorcan Quarry in Co. Kilkenny. These fossil plants evolved around 400 million years ago during the Devonian period. Archaeopteris was a tree-like plant with fern-like leaves but it wasn't a true tree as it didn't have woody tissue. These plants typically grew up to 30 m in height and their trunks could reach up to 1.5 m in diameter. These plants grew in wet swampy environments.
Archaeopteris is often considered one of the earliest types of tree.