Larix hybr.

The history of larch plantings for timber outside their natural range is a long one. This has lead to the realisation that closely related larch species, when planted close together, can hybridise. Hybrids have also been produced and planted deliberately, often being faster-growing than their parent species. This characteristic is known as heterosis, or hybrid-vigour. The best-known hybrid world-wide is that between the Japanese and European larches (Larix x marschlinsii), known as “Henry’s larch” in Finnish, but Dunkeld or simply Hybrid larch in English.