Carex magellanica, (common names, boreal bog sedge or tall bog sedge) is a perennial Carex species native to North America,[1] Europe and the subarctic Northern hemisphere.

[2] Although it is considered a stable species worldwide, it is listed as endangered in Connecticut.

[3] Carex magellanica is a perennial sedge, which grows loosely tufted from a short to long rhizome.

Its culms grow upward of 55 cm (22 in), and are leafy in their lower part.

[5] Carex magellanica favours wet ground, marshes, waterways and Sphagnum bogs.