Linnaeus, C. (1 May 1753), Species Plantarum 1: 385 [tax. nov.]

• Type: (not designated).

Linnaeus, C. (1754), Genera Plantarum Edn. 5: 182 [secondary reference]

Candolle, A.P. de in Candolle, A.P. de (ed.) (1824), Zygophylleae. Prodromus Systematis Naturalis Regni Vegetabilis 1: 705 [secondary reference]

Mueller, F.J.H. von (February 1862), Thalamiflorae. The Plants Indigenous to the Colony of Victoria 1: 100-101 [secondary reference]

taxonomic synonym: Roepera A.Juss. legitimate taxonomic synonym: Sarcozygium Bunge legitimate

Bentham, G. (30 May 1863), Flora Australiensis 1: 292 [secondary reference]

Mueller, F.J.H. von (1882), Systematic Census of Australian Plants: 13 [secondary reference]

taxonomic synonym: Sarcozygium Bunge legitimate

Mueller, F.J.H. von (10 March 1884), Systematic Census of Australian Plants Suppl. 1: 4 [secondary reference]

taxonomic synonym: Roepera A.Juss. legitimate

Mueller, F.J.H. von (December 1889), Second Systematic Census of Australian Plants: 22 [secondary reference]

taxonomic synonym: Roepera A.Juss. legitimate taxonomic synonym: Sarcozygium Bunge legitimate

Dixon, W.A. (1906), The Plants of New South Wales: 51-52 [secondary reference]

Bailey, F.M. (1913), Comprehensive Catalogue of Queensland Plants: 72 [secondary reference]

common name: Bean Capers [n/a]

Black, J.M. (1924), Casuarinaceae - Euphorbiaceae. Flora of South Australia 2: 332-333 [secondary reference]

• Etymology: From Greek zygon, yoke, pair; phyllon, leaf: referring to the pair of leaflets which compose each leaf.

Hitchcock, A.S. in Ramsbottom, J., Wilmott, A.J., Wakefield, E.M. & Sprague, T.A. (ed.) (August 1929), The application of Linnean generic names to be determined by means of specified Standard-species. Nomenclature: Proposals by British Botanists: 153 [secondary reference]

• Type: Zygophyllum fabago L.

Black, J.M. (January 1948), Casuarinaceae-Euphorbiaceae. Flora of South Australia Edn. 2, 2: 487 [secondary reference]

• Etymology: "From Greek zygon, yoke, pair; phyllon, leaf; referring to the pair of leaflets which compose each leaf."

Curtis, W.M. (1956), The Student's Flora of Tasmania 1: 88-89 [secondary reference]

Eichler, Hj. (1965), Supplement to J.M.Black's Flora of South Australia (Second Edition, 1943-1957): 201 [secondary reference]

Curtis, W.M. & Morris, D.I. (1975), Angiospermae: Ranunculaceae to Myrtaceae. The Student's Flora of Tasmania Edn. 2, 1: 93 [secondary reference]

Cronquist, A.J. (1981), An Integrated System of Classification of Flowering Plants: 820 [secondary reference]

Eichler, Hj. in Jessop, J.P. (ed.) (1981), Zygophyllaceae. Flora of Central Australia: 180, 182 [secondary reference]

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 212 [secondary reference]

Henderson, R.J.F. in Stanley, T.D. & Ross, E.M. (1984), Zygophyllaceae. Flora of South-eastern Queensland 1: 402-403 [secondary reference]

Wheeler, J.R. in Marchant, N.G., Wheeler, J.R., Rye, B.L., Bennett, E.M., Lander, N.S. & Macfarlane, T.D. (1987), Zygophyllaceae. Flora of the Perth Region 1: 491 [secondary reference]

Eichler, Hj. (26 September 1990), Four New Species of Zygophyllum (Zygophyllaceae) and one lectotypification. Telopea 4(1): 13-17 [secondary reference]

Brummitt, R.K. (1992), Vascular Plant Families and Genera: 375 [secondary reference]

taxonomic synonym: Roepera A.Juss. legitimate

Eichler, Hj. in Harden, G.J. (ed.) (1992), Zygophyllum. Flora of New South Wales 3: 8 [secondary reference]

Lawrence, M.E. in Wheeler, J.R. (ed.) (1992), Zygophyllaceae. Flora of the Kimberley Region: 681 [secondary reference]

Jeanes, J.A. in Walsh, N.G. & Entwisle, T.J. (ed.) (1999), Zygophyllaceae. Flora of Victoria 4: 198-199 [secondary reference]

Council of Heads of Australasian Herbaria (2007), Australian Plant Census: - [secondary reference]

taxonomic synonym: Agrophyllum Neck. nom. inval., opera utique oppressa taxonomic synonym: Roepera A.Juss. legitimate taxonomic synonym: Zygophyllum subg. Agrophyllum Endl. legitimate taxonomic synonym: Sarcozygium Bunge legitimate taxonomic synonym: Zygophyllum sect. Roepera F.Muell. nom. inval., nom. nud. taxonomic synonym: Zygophyllum sect. Haplocarpus F.Muell. nom. inval. taxonomic synonym: Zygophyllum sect. Sarcozygium (Bunge) Engl. legitimate taxonomic synonym: Zygophyllum sect. Agrophyllum (Endl.) Engl. legitimate taxonomic synonym: Zygophyllum sect. Roepera (A.Juss.) Engl. legitimate taxonomic synonym: Zygophyllum sect. Roeperiopsis Engl. legitimate

• APC Dist.: WA, NT, SA, Qld, NSW, Vic

Sheahan, M.C. in Kubitzki, K. (ed.) (2007), Zygophyllaceae. The Families and Genera of Vascular Plants 9: 493 [secondary reference]

Mabberley, D.J. (1 May 2008), Mabberley's Plant-Book Edn. 3: 926 [secondary reference]

Barker, R.M. in Wilson, A.J.G. (ed.) (2013), Zygophyllaceae. Flora of Australia 26: 544-546 [secondary reference]

taxonomic synonym: Roepera A.Juss. legitimate taxonomic synonym: Sarcozygium Bunge legitimate taxonomic synonym: Zygophyllum sect. Roepera F.Muell. nom. inval., nom. nud. taxonomic synonym: Zygophyllum sect. Haplocarpus F.Muell. nom. inval. taxonomic synonym: Zygophyllum sect. Agrophyllum (Endl.) Engl. legitimate taxonomic synonym: Zygophyllum sect. Sarcozygium (Bunge) Engl. legitimate taxonomic synonym: Zygophyllum sect. Roepera (A.Juss.) Engl. legitimate taxonomic synonym: Zygophyllum sect. Roeperiopsis Engl. legitimate

• Etymology: "from the Greek zygon (yoke) and phyllon (pair), a reference to the pair of leaflets which comprise each leaf and are responsible for the common name, Twinleaf."

Bostock, P.D. & Holland, A.E. (3 October 2014), Appendix A. Name and status changes 2013 census to 2014 census. Census of the Queensland Flora: 29 [secondary reference]

taxonomic synonym: Roepera A.Juss. legitimate

Council of Heads of Australasian Herbaria (31 July 2018), Australian Plant Census: - [pro parte taxonomic synonym]

pro parte taxonomic synonym of: Roepera A.Juss. legitimate

Council of Heads of Australasian Herbaria (2019), Australian Plant Census: - APC [secondary reference]

taxonomic synonym: Agrophyllum Neck. nom. inval., opera utique oppressa taxonomic synonym: Zygophyllum subg. Agrophyllum Endl. legitimate taxonomic synonym: Sarcozygium Bunge legitimate taxonomic synonym: Zygophyllum sect. Agrophyllum (Endl.) Engl. legitimate taxonomic synonym: Zygophyllum sect. Sarcozygium (Bunge) Engl. legitimate

• APC Dist.: Qld

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