All trees belong to a closely-related species. The alder is a member of the birch family; in the last analysis the poplar is nothing else than a willow. And one might even say that all of them approach the fundamental type of the latter. All foresters and woodmen know that trees are quite ready to accept a certain adaptation to the character of the circumjacent vicinity—a certain imitation or mimicry of the dominant taste in lines and forms. It is the fantastic, witch-like, distorted line of the willow which prevails here—this faithful companion and attendant of still and of flowing waters, with the crooked finger, projecting, broom-like, branching boughs, and it is these features which the others obviously seek to imitate. The silver poplar crooks herself wholly in the style of the willow, and it is often difficult to tell her from the birch which, seduced by the _genius loci_, also frequently affects the most extravagant crookednesses—though I would not go so far as to say that this dear and friendly tree was not to be found, and numerously found, in exceedingly shapely specimens. These, when the afternoon light is fervent and favourable, are even most enchanting to the eye. The region knows it as a small silvery trunk with sparse single leaves in the crown, as a sweet grown-up limber virgin with the prettiest of chalky stems and a trim and languishing way of letting the locks of her foliage hang. But it also makes its appearance as a creature of absolutely elephantine proportions with a waist which no man could span with his arms and a rind which has preserved traces of its erstwhile whiteness only high up towards the top, whilst near the ground it has become a coarse, calcined and fissured bark. As to the soil—this has little resemblance to that of a forest. It is pebbly, full of clay and even sand, and no one would dream of calling it fertile. And yet within limits it _is_ fertile—even to luxuriance. A tall grass flourishes upon it, though this often assumes a dry, sharply angular and meagre character. In winter it covers the ground like trampled hay. Sometimes it degenerates into reeds, whilst in other parts it is soft, thick, and lush, mixed with hemlock, nettles, colt’s foot, all manner of creeping, leafy stuff, high, rocket-like thistles, and young and tender tree-shoots. It is a favourite hiding-place for pheasants and quail, and the vegetation runs in billows against the gnarled boles of the tree-roots. Out of this chaos of undergrowth and ground thicket the wild vine and the wild hop-plant go gyrating up in spirals, draping broad-leaved garlands upon the trees and even in winter clinging to the trunks with tendrils which resemble hard and unbreakable wire.