Sharp edge sedge

Cyperus haspan -- Center for Aquatic and Invasive Plants

Cyperus haspan

Native to Florida

This native sedge is not robust; its stems are small, soft and weak. You may find it growing in profusion in marshes, bogs, lake and pond margins, along moist roadside ditches and in other disturbed and natural areas with shallow water. This species of Cyperus is only one of approximately 50 in Florida (Wunderlin, 2003). Sharp edge sedge occurs in southeastern U.S. and PR (Kartesz, 1999).

Sharp edge sedge is a sedge. Stems tuft-forming, 8-30 in. tall, sharply 3-angled, soft and weak; leaf blades none, just sheaths; sheaths few, purplish, loose, at base; inflorescence branched, having few narrow leaf-like bracts; spikelets in long- and short-stalked clusters, linear, to 5/8 in. long; nutlet slightly 3-angled.

For brief control information, see Efficacy of Herbicide Active Ingredients Against Aquatic Weeds by K. Langeland, M. Netherland, and W. Haller.