Elucidate the theme and critical overview of "Our Casuarina Tree."

This poem celebrates a
particular tree in India that seems to symbolise not only the speaker's childhood, but also
comes to stand for the former friends and family members who have died and passed on. The tree
is described as being so immense and powerful that even a thick creeper, which would strangle
any other tree, only appears to adorn the tree as though it were a scarf. The importance of this
tree however is summed up in the following...