Carex magellanica, commonly known as Boreal Bog Sedge, is a perennial herbaceous plant native to cool temperate and boreal regions of the Northern Hemisphere, including North America, Europe, and Asia. It thrives in sphagnum bogs, marshes, and wet woodlands, often under acidic conditions. This sedge typically grows at a moderate rate to a height of 1-2 feet (0.3-0.6 meters) and a width of 0.5-1 feet (0.2-0.3 meters). Its foliage is grass-like, with narrow leaves that contribute to a tufted appearance. The flowers are green or brown and inconspicuous, blooming in the summer, and are followed by small, capsule-like fruits that can be of interest in a garden setting.

Boreal Bog Sedge is valued for its ability to thrive in wet conditions and is often used in rain gardens, water features, and as a ground cover in damp areas of the landscape. It is also beneficial for erosion control and provides habitat for wildlife. In cultivation, it requires full sun to part shade and prefers slow-draining clay or loam soils with high moisture levels. While generally low-maintenance, it can be susceptible to leaf spot diseases in overly wet conditions. This sedge is not known for aggressive roots or significant invasiveness, making it a reliable choice for controlled naturalistic plantings.CC BY-SA 4.0