Because its leaves represent peace
olive branch is the peace leaf
an oak tree leaf duuh
It's called the "Shade Leaf"
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
the peace of tree called samip boss from nepal pokhara
The single-leaf Pinyon tree is Nevada's state tree.
scar
Maple leaves.
Broad"leaf`\, n. (Bot.) A tree (Terminalia latifolia) of Jamaica, the wood of which is used for boards, scantling, shingles, etc; -- sometimes called the almond tree, from the shape of its fruit.
A man who is called "the great peace" because he barried weopons unper a pine tree and called it the great peace.
Yes they are the same game. The one released in Japan is the Tree of Peace and the one released in the USA is called the Tree of Tranquility.