Little description of the Mountain Ash is needed, for in recent years it has come so much into favour that it is now one of the commonest of the trees planted in little suburban gardens and fore-courts. Its hardiness, its indifference to the character of the soil, the fact that other plants will grow beneath it, and the absence of need for pruning--all these points unite to make it suitable and popular for growth in restricted spaces. But the wood on the hillside is the natural home of the Mountain Ash, and in the Highlands its vertical range extends to 2600 feet above sea-level. [Illustration: _Pl. 111._ Rowan, or Mountain Ash--summer.] The Mountain Ash attains a height of from thirty to fifty feet, and has a straight clean bole, clothed in smooth grey bark, scarred horizontally as though it had been scored with a knife. All the branches have an upward tendency, and the shoots bear the long feathery leaves, whose division into six or eight pairs of slender leaflets suggests _the_ Ash, from which part of its name has been borrowed. Gazing on this tree either in flower or fruit, it would be quite unnecessary to explain that it is not even remotely allied to _Fraxinus excelsior_, and that the similarity of leaf-division is the only point of resemblance between them. These leaflets have toothed edges, are paler on the underside, and in a young condition the midrib and nerves are hairy. The creamy-white fragrant flowers are like little Hawthorn blossoms, though only half the size, and they appear in dense clusters (_cymes_) in May or June. The fruit are miniature apples, of the size of holly-berries, bright scarlet without and yellow within. They ripen in September, and are then a great attraction to thrushes, blackbirds, and their kind, who rapidly strip the tree of them. Though this at first sight may appear like frustrating the tree's object in producing fruit, it is not really so, the attractive flesh being a mere bait to induce the birds to pass the seeds through their intestines, and thus get them sown far and wide. By this method the process of germination is considerably hastened, whereas by hand-sowing the seeds lie in the earth for eighteen months before shooting. All the species of _Pyrus_ produce their fruits with this object, the larger more or less brownish ones being intended to attract mammals, the smaller and red-coloured to tempt birds. The seeds have leathery jackets to protect them from the action of the digestive fluids, and are further wrapped in a parchmenty, bony, or wooden "core" (_endocarp_) with a similar object. In the case of the Rowan this is very like wood. [Illustration: Rowan, or Mountain Ash. A, portion of flower-cluster.]