Polya.]

THE Oriental Plane is a native of Greece, and of other parts of the Levant; it is found in Asia Minor, Persia, and eastward to Cashmere; and likewise in Barbary, in the south of Italy, and in Sicily, although probably not indigenous in these

*Platanus. Flowers unisexual, the barren and fertile upon one plant, disposed many together, and densely, in globular catkins. Pistils numerous, approximately pairs. Ovary 1-celled, including 1-2 pendulous ovules. Stigmas 2, long, filiform, glandular in the upper part. Fruit autricle, densely covered with articulated hairs, including one pendulous, oblong, exalbuminous seed.

countries. It appears to have been introduced into England about the middle of the sixteenth century; but seems not to have been propagated to the extent it deserves, even as an ornamental tree; and the specimens now in existence are neither very numerous, nor are they distinguished for their dimensions.

In the East, the Oriental Plane grows to the height of seventy feet and upwards, with widely spreading branches and a massive trunk; forming altogether a majestic tree. The trunk is covered with a smooth bark, which scales off every year in large irregular patches, often producing a pleasing variety of tint. The bark of the younger branches is of a dark brown, inclined to a purple colour. The leaves are alternate, about seven inches long and eight broad, deeply cut into five segments, and the two outer ones slightly cut into two more. These segments are acutely indented on their borders, each having a strong midrib, with numerous lateral veins. The upper side of the leaves is a deep green, the under side pale. The petioles are rather long, with an enlargement at the base which covers the nascent buds. The catkins which contain the seed are of a globular form, and from two to five in number, on axillary peduncles; they vary greatly in size, and are found from four inches to scarcely one in circumference. The flowers are very minute. The balls, which are about the size of walnuts, and fastened together often in pairs like chain-shot, appear before the leaves in spring, and the seed ripens late in autumn; these are

small, not unlike the seed of the lettuce, and are surrounded or enveloped in a bristly down.

Of the Oriental Plane Loudon remarks, "As an ornamental tree, no one which attains so large a size has a finer appearance, standing singly, or in

small groups, upon a lawn, where there is room to allow its lower branches, which stretch themselves horizontally to a considerable distance, gracefully to bend toward the ground, and turn up at their extremities. The peculiar characteristics of the tree, indeed, is the combination which it presents of majesty and gracefulness; an expression which is produced by the massive, and yet open and varied character, of its head, the bending of its branches, and their feathering to the ground. In this respect it is greatly superior to the lime-tree, which comes nearest to it in the general character of the head; but which forms a much more compact and lumpish mass of foliage in summer, and, in winter, is so crowded with branches and spray, as to prevent, in a great measure, the sun from penetrating through them. The head of the Oriental Plane, during sunshine, often abounds in what painters call flickering lights; the consequence of the branches of the head separating themselves into what may be called horizontal undulating strata-or, as it is called in artistic phraseology, tufting-easily put in motion by the wind, and through openings in which the rays of the sun penetrate, and strike on the foliage below. The tree is by no means so suitable, as most others, for an extensive park, or for imitations of forest scenery; but, from its mild and gentle expression, its usefulness for shade in summer, and for admitting the sun in winter, it is peculiarly adapted for pleasure grounds, and, where there is room, for planting near houses and buildings. For the

latter purpose, it is particularly well adapted even in winter, for the colour of the bark of the trunk, which has a grayish white tint, is not unlike the colour of some kinds of freestone. The colour of the foliage, in dry soil, is also of a dull grayish green; which, receiving the light in numerous horizontal tuftings, readily harmonizes with the colour of stone walls. It appears, also, not to be much injured by smoke, since there are trees of it of considerable size in the very heart of London."

The Oriental Plane thrives best on a light free soil, moist, but not wet at bottom; and the situation should be sheltered, but not shaded or crowded by other trees. It will scarcely grow in strong clays and on elevated exposed places; nor will it thrive in places where the lime-tree does not prosper. It may be propagated by seeds, layers, or cuttings. The general practice is to sow the seeds in autumn, covering them over as lightly as those of the birch and alder, or beating them in with the back of the spade, and not covering them at all, and protecting the beds with litter to exclude the frost. The plants will come up the following year, and will be fit, after two years' growth, to run into nursery lines; from whence they may be planted into their permanent stations in two or three years, according to the size considered necessary. The growth of this tree is very rapid, attaining in the climate of London, under favourable circumstances, the height of thirty feet in ten years, and arriving at the height of sixty or seventy feet in thirty years. The longevity of