EARLY FUSIONS. “However, the capacity for fusion of plant parts was clearly present in early angiosperms, as basal fusion of the outermost perianth can even be found in the early diverging Amborella, in which a short fusion zone among the tepals occurs before the fusion with the stamen whorl, as well as in the early diverging lineages, including Cabomba, Canellales, Aristolochiaceae, Myristicaceae and Degeneria (Magnolialaes).”
https://lnkd.in/dD4GcAS