Salix arbuscula, commonly known as Mountain Willow, is a deciduous shrub native to the cold, mountainous regions of northern Scandinavia and eastwards to Siberia. In Scotland, it is specifically adapted to high-altitude environments, such as damp rocky mountain slopes and ledges, typically above 1,968 feet, with a notable presence in Perthshire and Argyll. It is a low, much-branched shrub that seldom exceeds 2.3 feet in height, with a similar spread, and thrives in the harsh conditions of its native alpine and subarctic habitats.

Mountain Willow is valued for its resilience to cold climates and its ability to stabilize soil in rocky areas. Its small stature and branching habit make it suitable for rock gardens and alpine garden settings. It prefers moist, well-drained soils and can tolerate partial shade, although it flourishes in full sun. While not widely cultivated, it can be an interesting addition to collections of cold-hardy plants. It is relatively low-maintenance but may require protection from strong winds due to its delicate branches.CC BY-SA 4.0