Seed ferns: Plants experimented with complex leaf vein networks 201 million years ago According to a research team led by palaeontologists, the net-like leaf veining typical for today's flowering plants developed much earlier than previously thought, but died out again several times. Using new methods, the fossilized plant Furcula granulifer was identified as such an early forerunner. The leaves of this seed fern species already exhibited the net-like veining in the late Triassic (around 201 million years ago).
https://www.sciencedaily.com/r....eleases/2024/04/2404