Blake, S.T. (1969), Studies in Cyperaceae. Contributions from the Queensland Herbarium 8: 30 [comb. nov.]

basionym: Lepidosperma tetragonum Labill. legitimate

Jessop, J.P. in Black, J.M. (1978), Flora of South Australia Edn. 3, 1: 286 [nomenclatural synonym]

nomenclatural synonym of: Machaerina tetragona (Labill.) T.Koyama ex Jessop legitimate

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 10 [secondary reference]

nomenclatural synonym: Cladium tetragonum (Labill.) J.M.Black legitimate taxonomic synonym: Cladium tetraquetrum Hook.f. var. tetraquetrum legitimate taxonomic synonym: Machaerina tetragona T.Koyama nom. inval.

Sharpe, P. in Stanley, T.D. & Ross, E.M. (1989), Cyperaceae. Flora of South-eastern Queensland 3: 335, Fig. 50I [secondary reference]

nomenclatural synonym: Lepidosperma tetragonum Labill. legitimate nomenclatural synonym: Cladium tetragonum (Labill.) J.M.Black legitimate taxonomic synonym: Cladium tetraquetrum Hook.f. legitimate taxonomic synonym: Machaerina tetragona T.Koyama nom. inval. common name: Square Twigrush [n/a]

Wilson, K.L. in Harden, G.J. (ed.) (1993), Cyperaceae. Flora of New South Wales 4: 318 [secondary reference]

nomenclatural synonym: Lepidosperma tetragonum Labill. legitimate nomenclatural synonym: Cladium tetragonum (Labill.) J.M.Black legitimate taxonomic synonym: Cladium tetraquetrum Hook.f. legitimate

Morris, D.I. in Curtis, W.M. & Morris, D.I. (1994), Baumea. The Student's Flora of Tasmania 4B: 131 [secondary reference]

nomenclatural synonym: Lepidosperma tetragonum Labill. legitimate taxonomic synonym: Cladium tetraquetrum Hook.f. legitimate taxonomic synonym: Cladium teretifolium var. tetraquetrum (Hook.f.) Domin legitimate taxonomic synonym: Machaerina tetragona T.Koyama nom. inval.

Wilson, K.L. in Walsh, N.G. & Entwisle, T.J. (ed.) (1994), Cyperaceae. Flora of Victoria Edn. 1, 2: 274, pl. 4a-c [secondary reference]

nomenclatural synonym: Lepidosperma tetragonum Labill. legitimate nomenclatural synonym: Cladium tetragonum (Labill.) J.M.Black legitimate taxonomic synonym: Cladium tetraquetrum Hook.f. legitimate common name: Square Twig-rush [n/a]

Jessup, L.W. (2005), Flora of South-eastern Queensland Volume 3 Changes to names or status of taxa: - [misapplied]

misapplied to: Baumea planifolia (Benth.) K.L.Wilson legitimate by Sharpe, P. in Stanley, T.D. & Ross, E.M. (1989), Cyperaceae. Flora of South-eastern Queensland 3: 335, Fig. 50I

State Herbarium of South Australia (2008), Fact sheets. The Electronic Flora of South Australia: - [secondary reference]

nomenclatural synonym: Lepidosperma tetragonum Labill. legitimate nomenclatural synonym: Cladium tetragonum (Labill.) J.M.Black legitimate nomenclatural synonym: Machaerina tetragona (Labill.) T.Koyama ex Jessop legitimate taxonomic synonym: Cladium tetraquetrum Hook.f. legitimate common name: Square Twig-rush [n/a]

National Herbarium of New South Wales (2009), PlantNET Flora of New South Wales Online: - [secondary reference]

taxonomic synonym: Cladium tetraquetrum Hook.f. legitimate

Council of Heads of Australasian Herbaria (2012), Australian Plant Census: - [secondary reference]

nomenclatural synonym: Lepidosperma tetragona Labill. orth. var. nomenclatural synonym: Lepidosperma tetragonum Labill. legitimate nomenclatural synonym: Lepidotosperma tetragonum Roem. & Schult. orth. var. nomenclatural synonym: Cladium tetragonum (Labill.) J.M.Black legitimate nomenclatural synonym: Machaerina tetragona (Labill.) T.Koyama ex Jessop legitimate taxonomic synonym: Cladium tetraquetrum Hook.f. legitimate taxonomic synonym: Cladium tetraquetrum Hook.f. var. tetraquetrum legitimate taxonomic synonym: Gahnia tetraquetra (Hook.f.) F.Muell. legitimate taxonomic synonym: Mariscus tetraquetrus (Hook.f.) Kuntze legitimate taxonomic synonym: Cladium teretifolium var. tetraquetrum (Hook.f.) Domin legitimate taxonomic synonym: Machaerina tetragona T.Koyama nom. inval. taxonomic synonym: Machaerina tetragona H.Eichler nom. inval.

• APC Dist.: SA, NSW, Vic, Tas

de Salas, M.F. & Baker, M.L. (2016), Tasmanian vascular plant census. A Census of the Vascular Plants of Tasmania, including Macquarie Island: 83 [secondary reference]

nomenclatural synonym: Lepidosperma tetragonum Labill. legitimate taxonomic synonym: Cladium tetraquetrum Hook.f. legitimate

Council of Heads of Australasian Herbaria (7 July 2021), Australian Plant Census: - [nomenclatural synonym]

nomenclatural synonym of: Machaerina tetragona (Labill.) T.Koyama ex Jessop legitimate

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