Split leaf

[Phoenikakias]

So far I have seen in this forum pictures of split leaves from various palms like Dypsis and Jubaeopsis. Here is a picture of another one from my Allagoptera. Do we know what causes such a split; is it a preliminary sign of future forking of the whole plant? As much as I can recall such split is known only on pinnate fronds, but there are also fan palms which eventually divide from a single to double or more plants such as Trithrinax campestris or Nannorrhops ritchiana, but I have not seen yet any split palmate leaf. Does anyone know more details on this issue?

[Kostas]

Its probably splitting its growing point and forking, which is normal for this species. Random things happen as well, though most if not all cases i have seen where just prior to obvious splitting of the growing point.