It's called the "Shade Leaf"
the base is the place where the leaf joins its stem
an oak tree leaf duuh
The place on a tree branch where a leaf has fallen from is called a leaf scar. This mark is left behind when the leaf detaches and falls from the tree branch, and it can vary in size and shape depending on the type of tree.
leaf scar
While the entomology of leaf is not known for certain, it is possible it has to do with a leaf on a tree. Since a leaf is an extension of a tree, a table leaf is an extension of a table.
Needles
you parked near a tree and your window was open
Because its leaves represent peace olive branch is the peace leaf
Maple leaves.
Trees "breathe" CO2 (carbon dioxide) through extremely small openings between the plants cells on the bottom of the leaf, called stomata (stoma singular). Through the same stomata O2 leaves the leaf.
The single-leaf Pinyon tree is Nevada's state tree.
A strictly binary tree is a tree in which every node other than the leaf nodes has exactly two children. OR in the Graph Theory perspective a tree having it's root vertex with degree 2 and all other non-leaf vertex of degree 3 and leaf vertex of degree 1, is called as the strictly binary tree. it is also called as the 2-tree or full binary tree.