The biggest found was more than 8 metres long, and they have patterns like the growth rings of modern trees. (newscientist.com)
The fossils reveal that, unlike modern trees with a single shaft, cladoxylopsids had multiple xylem columns spaced around the perimeter of a hollow trunk. (sciencemag.org)
Cordaites are most like trees we know today: Branches fanned out to form the round shape of tall modern trees, while bunches of leathery leaves sprouted from the end of each limb. (discovermagazine.com)