Cladium tetragonum (Labill.) J.M.Black = Machaerina tetragona (Labill.) T.Koyama
English:
tetragonus,-a,-um;

https://archive.org/stream/#page/95/mode/2up
homotypic synonyms:
Baumea tetragona (Labill.) S.T.Blake; Lepidosperma tetragonum Labill.; Machaerina tetragona (Labill.) T.Koyama;

protologue: Fl. S. Austral. : 95 (1922)

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