40; see text Tetraria is a genus of flowering plants in the sedge family, Cyperaceae, native to Tanzania, South Africa, Borneo, Australia and New Zealand.

[4] Recent molecular work has shown that Tetraria is polyphyletic and in need of revision.

[7] The leaves are conspicuously sheathed with flat or incurved blades.

[7] The fruit (a nutlet) is generally trigonous and often retains its style as a beak or crown.

[7] 40 species are currently accepted by Plants of the World Online:[3]