From what I knew these are the 5 parts of leaves:
- Tip
- Margin
- Blade
- Veins (side & central)
- Leaf stalk/ Petiole
But in some resources, the parts of leaves are (it's 6):
- Blade
- Petiole
- Stipules
- Veins
- Midrib
- Small netted vein
I don't know which is the correct one. But I hope it helps :)
--Mizu