what is this ?

[gp]

in the pchak foto placed by mahratt, I notices a stamp or etching which portrays a leaf.

This leaf I have seen before as :

- a stamp on some Ottoman bichaqs and kamas (approx. pre 1870)
- a piece of Turkish art : a dried leaf of exact the same type on which a Mevlana Derwish has been painted being in the middle of performing a Zikr.

Never paid that much attention to it, but as this is the 3rd time I see this leaf, would you know its significance ?

FYI: I couldn't find anything in the Sufi literature ...