depends on the type of oak tree
there's red oaks and white oaks
an oak tree leaf duuh
The unknown leaf comes from the oak tree.
Green
leaf
They will come from the area where the leaf meets the branch usually.
Broad leaf
Blue Oak I just know it
needles?
Palmate.
sounds like mold, but could be "oak gall wasps".
no way its like planting a leaf
The blade length of a red oak tree leaf (Quercus rubra) typically ranges from 4 to 8 inches (10 to 20 cm). The leaves are lobed with pointed tips and have a glossy green appearance. Their size and shape can vary depending on the growing conditions and the specific cultivar.