A tree that has intrigued European foresters for more than a century but has proven to be a significant silvicultural challenge. Introduced 1910 by Frederick Balfour (1873–1945).

Native to the Andes along the border between Argentina and Chile.

Monoecious. Deciduous. Wind-pollinated. Wind-dispersed.

Tall (40m) with a straight bole, conic crown, fairly level branches and dense foliage. Bark grey, smooth then cracking into long narrow vertical plates. Twigs brown, brown-haired, zig-zagging between sharp red-green buds. Foliage flushes bronze, turning gold-orange in autumn. Leaves 6-10cm, with 14-18 impressed vein pairs giving a corrugated underside, finely downy, bluntly serrate. Fruit a resinous four-valved cupule with 2-3 winged nutlets. Roblé differs: drooping branches, smaller more lobed leaves.

A fast-growing, light-demanding species, hardy only to -14°C, with a tendency to flush early and harden late, often leading to frost damage. It grows best in fertile, well-drained, neutral soils and needs shelter. A warming climate could strengthen its presence in Britain and Ireland, though its drought intolerance may be limiting.

No notable associations where introduced.

Site suitability remains a challenge where introduced, with provenance choice important.

In theory, a highly productive broadleaved tree for use in commercial forestry. Timber is similar to that of European Beech but less dense.