The bark of the Holly is smooth and pale-grey in colour. Time out of mind it has been used in the preparation of a viscid substance known as birdlime, which, spread on twigs, holds the feet of small birds. Respecting the foliage of the Holly, there is little need to say anything, but for uniformity's sake we may note that the leaves are oval in shape, of a leathery consistence, with a firmer margin, running out into long sharp spines. It is a fact worthy of note that when the Holly has attained to a height of ten feet or so, it frequently clothes its upper branches in leaves that have no spines—a circumstance that Robert Southey sought to explain in his poem "The Holly-tree," on teleological grounds. His second verse, however, contains sufficient explanation of the fact it describes:—
"Below, a circling fence, its leaves are seen
Wrinkled and keen;
No grazing cattle through their prickly round
Can reach to wound;
But, as they grow where nothing is to fear,
Smooth and unarm'd the pointless leaves appear."
In some places the young shoots are gathered by the peasants, dried, bruised, and used as a winter cattle-food. No doubt, in the early history of the Holly, cattle found out its good qualities for themselves, and browsed upon the then-unarmed foliage. In self-defence the tree developed spines upon its leaves, and so kept its enemies at a respectful distance. Above the reach of these marauders the production of spines would be a useless waste of material.
The flowers of the Holly, though small, are conspicuous by their great number and white colour. They are about a quarter
of an inch across, with four petals and four stamens or stigmas. Sometimes flowers with stamens are produced by the same tree that bears flowers with stigmas; but often the male and the female flowers are borne by separate trees, so that the possessor of a Holly that is solely male is sometimes puzzled by the fact that his tree, though covered with blossom, never produces a berry. The fruit is analogous in structure to that of the Plum and Cherry, and is technically termed a drupe; but instead of the single stone of these fruits, in the Holly-berry there are four bony little stones, each with its contained seed. The berries ripen about September, and are then scarlet and glossy, though here and there one finds a tree whose fruit never gets beyond the yellow stage of coloration.