Trees were of special importance to Tolkien — in his short story "Leaf by Niggle", which in a sense was an elaborate allegory explaining his own creative process, the protagonist, Niggle, spends his life painting a single tree.
As árbores en xeral tiñan unha especial importancia para Tolkien: no seu relato curto "Leaf by Niggle", que en certo sentido é unha elaborada alegoría que explica o seu propio proceso cretivo, o protagonista Niggle pasa toda a vida a pintar unha única árbore.