During Frodo's travels through Ithilien, he encountered ilexes on at least two occasions. The name seems to refer to the tree otherwise known as the 'holm-oak',¹ a type of evergreen oak tree that favours warm climates like that of Ithilien. In spring, the branches of the ilex are hung with strings of catkins, and the trees grow to considerable size. At one stage in their journey, Frodo and Sam rested for a time among the branches of an ilex or holm-oak tree.