Betula nana, commonly known as dwarf birch, is a small, deciduous shrub native to Arctic and subarctic regions. It typically grows to about 1 meter in height and features slender, flexible branches. The leaves are small, rounded, and have a serrated edge, turning yellow in the fall. This plant thrives in cold, wet environments, often found in tundra and bog habitats. Betula nana plays a crucial role in its ecosystem, providing food and shelter for various wildlife. Its ability to tolerate harsh conditions makes it an important species for studying climate change impacts in polar regions.