Globose Sedge (or Globe Sedge)
Cyperus echinatus · Warm-season, Perennial, C4
Grass Family
Cyperaceae (Sedge Family)
Grass Category
Invasive/Weed Grass, Native Prairie, Wetland/Riparian
Variety / Cultivar
Native species (Wild type)
Hardiness Zones
USDA Zones 5-9; enters dormancy in winter turning a tan/straw color; thrives in heat and high humidity.
About This Grass
While technically a sedge rather than a true grass, it features triangular stems typical of Cyperaceae. It forms tufted clumps of bright green foliage with distinctive spherical, spiked seed heads (umbels) that appear 'star-like' or globose.
Blade Characteristics
Blades are glossy, bright green, and V-shaped or flat in cross-section. They are relatively narrow (2-4mm) with a distinct mid-vein and long, tapering pointed tips. Stems are solid and triangular ('sedges have edges').
Root System
Fibrous root system with short, thick rhizomes; forms tight clumps rather than a spreading sod; moderately deep and very resilient.
Growing Information
Origin Region
Native to the Central and Eastern United States
Growth Habit
Bunch-type (Clumping) with short, inconspicuous rhizomes
Sunlight & Water Needs
Full sun to partial shade; prefers moist to wet soils but exhibits significant drought tolerance once established; thrives in disturbed or poorly drained areas.
Mowing & Maintenance
Low maintenance; usually treated as a weed in lawns. If mowed, maintain at 3-4 inches; it is resistant to standard broadleaf herbicides but sensitive to sedge-specific herbicides like Sedgehammer.
Special Characteristics
Extreme moisture tolerance; sharp, spiked seed heads; resistant to most lawn diseases; highly competitive in thin turf or wet spots.
Ecological Information
Native status in the US; provides seeds for waterfowl and small mammals; stabilizes soil in riparian zones; can be invasive in managed turf and ornamental gardens.