Carex glacialis, commonly known as alpine sedge, is a small, perennial herbaceous plant belonging to the sedge family (Cyperaceae). This species is a significant component of alpine and arctic ecosystems, adapted to harsh, cold environments. Its ecological role often involves stabilizing soil in exposed, rocky areas and contributing to the biodiversity of these specialized habitats. Physically, Carex glacialis is a low-growing sedge, typically reaching heights of only 5 to 15 centimeters. It forms dense, compact tufts or small tussocks. The leaves are slender, linear, and grass-like, usually measuring 1 to 2 millimeters in width, and are often shorter than the flowering stems. The color of the leaves is typically a dull green. The inflorescence is a solitary, terminal spike, which is usually short and dense, often appearing somewhat capitate or oblong. The spike contains both male and female flowers, with the male flowers typically located at the apex and the female flowers below. The perigynia, which enclose the achenes (seeds), are small and have a characteristic shape, often described as obovoid or broadly ovate, and are typically pale green to brownish. The achenes are trigonous. Fruiting occurs in summer, and the small, inconspicuous seeds are dispersed by wind or water. The native distribution of Carex glacialis is circumboreal, found in arctic and alpine regions of North America, Europe, and Asia. It thrives in cold climates, typically occurring at high elevations in mountainous areas or in low-lying arctic tundra. Its natural habitats include rocky slopes, gravelly areas, scree, alpine meadows, and open, well-drained soils. It is often found on calcareous substrates. Cultivation requirements for this species are specific, favoring cool conditions, well-drained, lean soils, and full sun to partial shade. Due to its specialized habitat requirements and small size, it is not widely cultivated in horticulture but is of interest to collectors of alpine or arctic plants. While not of significant economic or medicinal importance, Carex glacialis plays a vital role in its native ecosystems. Its ability to colonize and stabilize disturbed or rocky substrates contributes to primary succession and prevents soil erosion in fragile alpine and arctic environments. As a producer, it forms the base of food webs for various herbivores and invertebrates in these regions. Interesting adaptations of Carex glacialis include its ability to survive extreme cold, low nutrient availability, and high winds characteristic of its natural environment. Its compact growth habit and small size are likely adaptations to reduce wind resistance and conserve energy in these challenging conditions. The solitary spike and small, wind-dispersed seeds are also typical of plants adapted to open, exposed habitats.