WALNUT, _Juglans regia_, L.—From Europe and Asia. Does not exceed 25 metres in height, but is a metre and more in diameter. Grows as a forest tree, but is very suitable for stocking mixed woods in the 2nd, 3rd, 5th and 6th regions. To be sown in rows, in holes or in nursery beds and planted out when a year old. As the seeds keep their germinative power for a month only, they must be sown immediately or placed in layers. The wood, which is greatly prized, is one of the best known and valued. PARADISE TREE, _Melia azedarach_, L.—Southern Asia. 15 metres in height by 0·60 metre in diameter. A good auxiliary species for mixed woods and timber for cutting in the 3rd, 4th, 6th and 7th regions, where the eucalyptus does not freeze. NEGUNDO FRAXINIFOLIUM, Nutt.—From North America, growing well in the 3rd, 4th, 5th, 6th and 7th regions, where it attains a height of 10 to 15 metres by 0·50 metre in diameter. It is a good kind for mixed woods and timber for cutting. The seeds are sown immediately on ripening. It is also grown from grafting twigs. FIR, _Picea excelsa_, Linck.—From Europe, where it attains a height of 40 metres. The few specimens we know do not allow of our expressing any opinion, based on practical experience, about the possible merit of this splendid tree in our woods in the 3rd, 5th, 6th and 9th regions, though its origin and growth give reason for hope. In Europe, in all the plantations we know of in Germany, England and France, the fir is one of the best cold, storm and drought-resisting trees. It is sown in rows, in furrows 2·50 to 3 metres apart, according to the soil. It may be planted alone or alternately with birch trees. PINES.—The kind best known and cultivated here are the _Pinus austriaca_, _P. insignis_ and _P. Pinaster_. Without questioning the specific designation applied to certain kinds of pine trees, we may say that _P. insignis_ grows luxuriantly in the 4th, 5th and 7th regions, forming dense woods; the _P. Canariensis_, not quite so hardy, does not flourish so far south, the other kinds may be grown in those as well as in the Riparian austral and maritime regions, where they may prove very useful, as well as the varieties _P. maritima_, _P. laricio_, etc. PLANE TREE, _Platanus orientalis_, L.—From Europe and Asia Minor. It grows to 40 metres in height by 1 or 2 metres in diameter. It is the favourite for avenues; grows taller in the woods, but its foliage is not so luxuriant. Propagated from grafting twigs to be planted 50 centimetres apart in rows 2·50 metres apart. To be thinned out when two years old, leaving the latter distance between them and filling up the gaps with those taken out. Its wood is useful for many purposes, though not first class.