Background image represents the so called "star-rings", vascular bundles in the pith transporting water to the apex and the leaf primordia. Within the parenchymatous tissues surrounding them, there are also the mucilage cavities (white globular areas).

🌿Check the newly published article “Shoot apical meristem and initial vascular development of a late Palaeozoic spermatophyte (order Medullosales)” in @annbot.bsky.social by Lydéric Portailler & Ludwig Luthardt. (1/9)

👉https://doi.org/qr8r

#Paleobotany #PlantEvolution #FossilPlants #Botany