Bilva

The wood-apple tree (Aegle marmelos).
Although this tree is known for its delicious fruit, its primary religious importance is its leaves. These are used in the
worship of Shiva and are usually placed
as an offering on the god’s image or
linga (pillar-shaped symbol). These
leaves are believed to be dearer to him
than any other offering. In everyday language this tree is also commonly known
as the bel.