Cyperus helferi

Cyperus helferi is unique among Cyperus species in that it can thrive fully submerged as well as emergent, making it genuinely aquarium-suitable unlike most of its relatives. Native to the rivers of Thailand, it produces slender, arching leaves from a rosette base, reaching 20–40 cm tall. The leaves are narrow and ribbon-like with a gentle curve, creating a distinctive natural grace when planted in groups. It performs best with moderate light and benefits from CO2 supplementation and nutrient-rich substrate.