Narrow Leaf Cattail Sedge is a good choice for water gardens as it forms small clumps and lives in such habitats as wet forests, swamps, bottomland prairies, pond edges, marshes and waste places. Individuals either have male or female flowers from April to September. The fruits can be dark brown or almost black at maturity and stems with flowers are very triangular and brown near the base. This species is more common in eastern Missouri than in the western part of the state.