NATIVE or RED WILLOW, _Salix Humboldtiana_, Witti.—15 metres in height by 1 metre in diameter. Grows well in all regions where the eucalyptus does not freeze, gives timber for carpentry and multiplies from seed. A good auxiliary in mixed woods and timber for cutting, and for reafforestation on damp soil, where it is planted from twigs towards the end of the winter. For afforestation it is sown in plots when the seeds are ripe, in regions 4 and 7 and the more temperate part of region 3. SOUTHERN PINE, _Araucaria imbricata_, R. and P.—A tree 50 metres in height of our southern forests. Its timber is equal to the best pine, and it is one of the best stock kinds in the 6th region. To be sown in rows or in little holes when the seeds drop naturally in the 5th and 6th regions. MISIONES PINE, _Araucaria brasiliensis_, A. Rich.—This conifer grows to a height of 50 metres by 1 metre in diameter in certain valleys of the northern regions 1, 2, and part of 3, 4, 7 and 8, as far as Mar del Plata. Its timber is equal to that of the pine, it is used for joinery and building. Sown like the preceding tree. CYPRESS, _Libocedras chilensis_, Endl.—From the Andes, where it grows to a height of 25 to 30 metres by 0·70 metre in diameter. Its wood is fine and excels for furniture and veneering. A good auxiliary kind for the dense woods of the south. CHIEF SPECIES OF EXOTIC FOREST TREES GROWN IN THE COUNTRY FIR, _Abies Nordmanniana_, Spach.—From Asia Minor, where it grows to a height of 40 metres by 1·50 metres in diameter at least, 5th and 6th regions, in tall woods consisting of firs alone. ACACIA OLIVE, _Acacia melanoxylon_, R. Br.—From Australia, where it attains a height of 15 to 20 metres by 1 metre in diameter; very branchy, and giving very hard wood known as iron wood. A good stock kind in acacia, mimosa and laurel groves in regions 4, 5, 7 and 8, as far as Mar del Plata. To be sown in rows or in furrows. FRENCH MIMOSA, _Acacia dealbata_, Link.—Likewise from Australia; it attains a height of 20 metres by 0·50 metre in diameter, but breaks easily. A good predominating species and for reafforestation of timber for cutting, in regions 4, 5, 7 and 8, as far as 38° S. latitude. MAPLE TREE, _Acer pseudo platanus_, L.—A European tree 20 to 30 metres in height by 0·75 metre in diameter, growing as rapidly as the sycamore maple. An excellent auxiliary kind for tall woods of trees with deciduous leaves, in regions 4, 5, 6 and 7. To be sown in rows, in furrows or one-year-old saplings 2 metres apart.