=Douglas Fir= seed is, in most cases, readily removed from well-ripened cones by threshing or by pulling the cone to pieces, but, in some instances, particularly where the quantity is large, kiln-drying is resorted to. The seeds are ripe in December and should be gently watered and sown in May. =Elm= seeds are ripe in June, when they may either be sown at once, or dried and kept in stock for planting in March and April. =Hawthorn= seed, or berries, may be sown when collected, or the outer coating rotted off by keeping them during the winter in moist sand. =Hazel= nuts may be collected in autumn and sown at once, or kept till spring. =Holly= berries require to be placed in sand for about eighteen months so as to rot off the fleshy outer coating, and may be sown in March. The mixture of sand and berries, which should be about in equal proportions, must be turned frequently. They are usually sown with the sand in which they have been lying. =Horse= and =Spanish Chestnut= seeds may be taken together, the method of collecting and sowing being very similar in both cases. They are ripe by the middle of October, and may either be sown at once or kept till spring. One seed to 4 square in. will be close enough. =Larch= cones, when ripe, are of a rather bright brown colour and require to be collected from the trees. This should not, however, be done till spring, though occasionally they are gathered in December. They part with the seeds far more readily than those of the Scotch Fir, and consequently require less heat when in the kiln. =Maple= seeds are ready for collecting about October, and should not be sown till the beginning of April. =Mountain Ash=, indeed, all the Pyrus family and others of a like kind, require the berries to be placed in sand, and when the outer fleshy coating has rotted away they may be sown either in autumn or spring. =Oak.=—The acorns may be gathered or swept from the ground in November, and either sown at once or stored away in a cool, dry place till Spring. One acorn to every 4 square in. will be ample in the seed-bed. Sow in spring or autumn.