Formation of absession layer in the leaf petiole makes it wither every year. Before snowfall the oak trees get defoliated to mminimize the loss on its vegetative parts by freezing of water.
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.
depends on the type of oak tree there's red oaks and white oaks
Broad leaf
Blue Oak I just know it
needles?
sounds like mold, but could be "oak gall wasps".
no way its like planting a leaf
the bark is the part of an oak tree that is most like a human skin