Cyperus longus, commonly known as sweet cyperus or galingale, is a perennial sedge that can reach up to 3 feet in height. It is characterized by its creeping rhizomes and erect, triangular stems. Native to wetlands, marshes, and the margins of ponds and rivers, sweet cyperus thrives in moist, nutrient-rich soils. Its native range includes Africa and Eurasia , . The plant produces clusters of small, greenish-brown flowers in the summer, which are not particularly showy but have a sweet, aromatic scent.

Sweet cyperus is valued for its ability to stabilize soil and filter water in wetland settings. It is often used in water gardens, around ponds, and in naturalized areas where its vigorous growth is desired. For cultivation, it requires consistently moist or wet soil and can grow in full sun to part shade. While it is not typically grown for its ornamental qualities, the plant’s dense foliage can provide a lush, green backdrop in water features. Caution is advised when planting sweet cyperus outside its native range, as it can become invasive and outcompete native vegetation.CC BY-SA 4.0