 She immortalizes the tree through this poem like how Wordsworth sanctified the Yew trees of Borrowdale.She says "May love defend thee from Oblivion's curse'"- expressing her wish that love shield her tree against the curse of forgetfulness(Oblivion), that the tree be remembered out of love and not because it cannot be forgotten( Oblivion's curse, the inability to be forgotten).Our Casuarina Tree is an autobiographical poem .