Where the Hawthorn is allowed its natural growth, it attains a height of forty feet, with a circumference between three and ten feet. Such a tree is represented in our photograph. On our commons, where in their youth the Hawthorns have to submit to much mutilation from browsing animals, their growth is spoiled; but though some of these never become more than bushes tangled up with Blackthorn into small thickets, there are others that form a distinct bole and a round head of branches from ten to twenty feet high, which in late May or (more frequently) early June look like solid masses of snow. The characteristic of the tree which makes it so valuable as fencing material is found in its numerous branches, supporting a network of twigs so dense that even a hand may not be pushed among them without incurring serious scratches. That this character is not confined to it as a hedge shrub is clearly shown by the winter photograph of the leafless tree. [Illustration: Hawthorn, or May. A, fruit ("haws").] The well-known lobed leaves are very variable both in size and shape, and the degree to which they are cut. They are a favourite food with horses and oxen, who would demolish the hedges that confine them to the fields but for the spines which protect the older branches at least. The white flowers are about three-quarters of an inch across, borne in numerous corymbs. The pink anthers give relief to the uniform whiteness of the petals. The flowers, though usually sweet-scented, occasionally give forth a very unpleasant odour. The familiar fruits, too, instead of their usual crimson, are yellow occasionally, as in the Holly. In favourable years these are so plentiful that they quite kill the effect of the dark-green leaves, and when such a tree is seen in the October sunshine, it appears to be glowing with fire to its centre. Beneath the ripe mealy flesh there is a hard bony core, in whose cells the seeds are protected from digestion when the fruit has been swallowed by a bird. The Hawthorn is said to live from a century to two centuries, growing very slowly after it has reached a height of about fifteen feet. Its wood is both hard and tough, and the name of the genus has reference to that fact, being derived from the Greek kratos, strength. [Illustration: _Pl. 120._ Hawthorn--summer.] [Illustration: _Pl. 121._ Flowers of Hawthorn--"May."] [Illustration: _Pl. 122._ Bole of Hawthorn.] [Illustration: _Pl. 123._ Hawthorn--winter.] The Strawberry-tree (_Arbutus unedo_).