Carex obnupta: The Versatile Slough Sedge
Carex obnupta, commonly known as slough sedge, is a perennial, evergreen sedge native to the Pacific Northwest of North America. It thrives in wet habitats and plays a significant role in both ecological functions and cultural practices.
Ecological Role & Habitat
Slough sedge is predominantly found in moist to very wet environments such as bogs, wet meadows, riverbanks, and shallow coastal swamps at lower elevations west of the Cascades. Its robust root system contributes to erosion control and streambank stabilization. Additionally, the dense swards formed by this sedge aid in sediment retention and nutrient uptake, thereby enhancing water quality. The plant also provides valuable habitat and food sources for various wildlife species. 
Planting Conditions
For optimal growth, Carex obnupta requires:
Sun Exposure: Full sun to partial shade.
Soil Moisture: Moist soil to standing water.
Tolerance: Capable of thriving in both fresh and brackish coastal wetland areas, though it shows a preference for freshwater environments. 
Plant Community Companions
In its natural habitat, slough sedge coexists with various moisture-loving species. Suitable companion plants include:
Kinnikinnick (Arctostaphylos uva-ursi): A groundcover that thrives in similar conditions.
Prostrate Ceanothus (Ceanothus prostratus): Complements the sedge in moist, sunny sites.
Seaside Daisy (Erigeron glaucus): Adds aesthetic appeal with its blooms.
Blue-eyed Grass (Sisyrinchium idahoense): Shares the moist habitat preferences of slough sedge. 
Traditional Uses and Folklore
Carex obnupta holds significant value in various cultural practices:
Basketry: Indigenous groups, particularly the Nitinaht and Nootka women, utilize the leaves of slough sedge for wrapping and twining in "grass" baskets. These baskets often feature designs of whales, birds, canoes, or geometric patterns woven with dyed strands. citeturn0search0
Folklore: The Nitinaht believed that harvesting grasses like slough sedge for baskets and mats could cause fog, leading to fishermen's annoyance. Additionally, Hesaquiat men reputedly used the sharp-edged grass for shaving. A Hesaquiat saying likens someone to citapt (slough sedge), implying they never change, as the plant's appearance remains constant.