Cyperus papyrus (papyrus sedge or paper reed) is a monocot belonging to the sedge family Cyperaceae. It is a herbaceousperennial native to Africa, and forms tall stands of reed-like swamp vegetation in shallow water.

Papyrus sedge (and its close relatives) has a very long history of use by humans, notably by the Ancient Egyptians—it is the source of papyrus paper, parts of it can be eaten, and the highly buoyant stems can be made into boats. It is now often cultivated as an ornamental plant.
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