The stems of Cladium mariscus are erect, up to 3 m tall, rounded and hollow except at the nodes. Leaves inserted at the stem base and along the stem. The inflorescence with terminal heads in the form of compressed pannicles, can reach a height of 5m.
Spreading is through stolons arising from woody rhizomes.
It occurs in marshy areas, swamps or along streams.
It is only suitable for big sites or riverine rehabilitation.