Fig. 50.Fig. 51.

§ 12. I find there is quite an infinite interest in watching the different ways in which trees part their sprays at this resting-place, and the sometimes abrupt, sometimes gentle and undiscoverable, severing of the upright stem into the wandering and wilful branches; but a volume, instead of a chapter or two, and quite a little gallery of plates, would be needed to illustrate the various grace of this division, associated as it is with an exquisitely subtle effacing of undulation in the thicker stems, by the flowing down of the wood from above; the curves which are too violent in the branches being filled up, so that what was at a, Fig. 50, becomes as at b, and when the main stem is old, passes at last into straightness by almost imperceptible curves, a continually gradated emphasis of curvature being carried to the branch extremities.

§ 13. Hitherto we have confined ourselves entirely to examination of stems in one plane. We must glance—though only to ascertain how impossible it is to do more than glance—at the conditions of form which result from the throwing out of branches, not in one plane, but on all sides. “As your fingers divide when they hold a ball,” I said: or, better, a large cup, without a handle. Consider how such ramification will appear in one of the bud groups, that of our old friend the oak. We saw it opened usually into five shoots. Imagine, then (Fig. 51), a five-sided cup or funnel with a stout rod running through the centre of it. In the figure it is seen from above, so as partly to show the inside, and a little obliquely, that the central rod may not hide any of the angles. Then let us suppose that, where the angles of this cup were, we have, instead, five rods, as in Fig. 52, A, like the ribs of a pentagonal umbrella turned inside out by the wind. I dot the pentagon which connects their extremities, to keep their positions clear. Then these five rods, with the central one, will represent the five shoots, and the leader, from a vigorous young oak-spray. Put the leaves on each; the five-foiled star at its extremity, and the others, now not quite formally, but still on the whole as in Fig. 3 above, and we have the result, Fig. 52, B—rather a pretty one.

Fig. 52.

§ 14. By considering the various aspects which the five rods would take in Fig. 52, as the entire group was seen from below or above, and at different angles and distances, the reader may find out for himself what changes of aspect are possible in even so regular a structure as this. But the branchings soon take more complex symmetry. We know that next year each of these five subordinate rods is to enter into life on its own account, and to repeat the branching of the first. Thus, we shall have five pentagonal cups surrounding a large central pentagonal cup. This figure, if the reader likes a pretty perspective problem, he may construct for his own pleasure:—which having done, or conceived, he is then to apply the great principles of subjection and resilience, not to three branches only, as in Fig. 49, but to the five of each cup;—by which the cups get flattened out and bent up, as you may have seen vessels of Venetian glass, so that every cup actually takes something the shape of a thick aloe or artichoke leaf; and they surround the central one, not as a bunch of grapes surrounds a grape at the end of it, but as the petals grow round the centre of a rose. So that any one of these lateral branches—though, seen from above, it would present a symmetrical figure, as if it were not flattened (A, Fig. 53)—seen sideways, or in profile, will show itself to be at least as much flattened as at B.

Fig. 53.

§ 15. You may thus regard the whole tree as composed of a series of such thick, flat, branch-leaves; only incomparably more varied and enriched in framework as they spread; and arranged more or less in spirals round the trunk. Gather a cone of a Scotch fir; begin at the bottom of it, and pull off the seeds, so as to show one of the spiral rows of them continuously, from the bottom to the top, leaving enough seeds above them to support the row. Then the gradual lengthening of the seeds from the root, their spiral arrangement, and their limitation within a curved, convex form, furnish the best severe type you can have of the branch system of all stemmed trees; and each seed of the cone represents, not badly, the sort of flattened solid leaf-shape which all complete branches have. Also, if you will try to draw the spiral of the fir-cone, you will understand something about tree-perspective, which may be generally useful. Finally, if you note the way in which the seeds of the cone slip each farther and farther over each other, so as to change sides in the middle of the cone, and obtain a reversed action of spiral lines in the upper half, you may imagine what a piece of work it would be for both of us, if we were to try to follow the complexities of branch order in trees of irregular growth, such as the rhododendron. I tried to do it, at least, for the pine, in section, but saw I was getting into a perfect maelström of spirals, from which no efforts would have freed me, in any imaginable time, and the only safe way was to keep wholly out of the stream.

Fig. 54.

§ 16. The alternate system, leading especially to the formation of forked trees, is more manageable; and if the reader is master of perspective, he may proceed some distance in the examination of that for himself. But I do not care to frighten the general reader by many diagrams: the book is always sure to open at them when he takes it up. I will venture on one which has perhaps something a little amusing about it, and is really of importance.

Fig. 55.