Carex laxiculmis aka Spreading Sedge

Carex laxiculmis belongs to the sedge family, Cyperaceae. It is a perennial, so it lives for years. Its names include spreading sedge and glaucous woodland sedge. It is native to southeastern Canada and the central and eastern United States. It grows in rich woods, on slopes, and in floodplains. In southern Missouri, it grows in moist upland forests. It suits gardens with shade and rich soil.

It forms a dense, round clump of evergreen leaves. Garden plants reach about 1 foot (0.3 m) tall and wide. Its narrow, blue-green leaves look much like grass. Leaves reach 1–1.2 feet (0.3–0.36 m) long. Each leaf measures about 0.04 feet (0.013 m) across. They feel like paper and have smooth edges without hairs. The leaves add more garden interest than the small flowers. It grows at a moderate rate. Clumps spread at a slow pace in good conditions.

Small flowers bloom from April to June. Some sources give the bloom time as May–June. The blooms range from green to pale yellow-white. Stems with three sides hold blooms above the leaves. The flower clusters lean well away from the upright stems. This trait gives the species its Latin name. Brown to copper-colored fruits follow from May through July. Each dry fruit is an achene. Birds and small mammals eat the fruits. They also find shelter among the leaves. Some satyrine butterfly larvae feed on the plant too.

Grow it in partial shade, dappled light, or deep shade. It prefers moist soil rich in organic matter. North Carolina State says it prefers acid soil. It also accepts brief spells of wet soil. Sources differ on how well it copes with dry soil. Missouri Botanical Garden says not to let soil dry out. It calls for extra water in hot summer weather. North Carolina State says established plants can cope with drought, even in dry shade. Moist soil remains the clearest choice shared by these sources. The plant is hardy in USDA zones 5–9.

Plant groups beneath trees or along woodland paths as ground cover. It also suits shaded borders, rain gardens, and containers. Other sites include moist low spots and pond or stream edges. It resists deer, which helps where deer limit plant choices. Both garden sources report no major pest or disease concerns. It needs little care when the site suits the plant. Cut back and clear old leaves in late winter. Divide clumps or sow seed to raise more plants. The supplied sources do not establish whether humans can eat it or whether it is toxic.