The Siberian Larch or Russian Larch (Larix sibirica; syn. L. russica) is a frost-hardy tree native to western Russia, from close to the Finnish border east to the Yenisei valley in central Siberia, where it hybridises with the Dahurian Larch L. gmelinii of eastern Siberia; the hybrid is known as Larix × czekanowskii.
It is a medium-size to large deciduous coniferous tree reaching 20-40 m tall, with a trunk up to 1 m diameter. The crown is conic when young, becoming broad with age; the main branches are level to upswept, with the side branches often pendulous. The shoots are dimorphic, with growth divided into long shoots (typically 10-50 cm long) and bearing several buds, and short shoots only 1-2 mm long with only a single bud. It is most easily distinguished from the closely related European Larch by the shoots being downy (hairless in European Larch). The leaves are needle-like, light green, 2-4 cm long, and turn bright yellow before they fall in the autumn, leaving the pale yellow-buff shoots bare until the next spring.