Candolle, A.L.P.P. de in Candolle, A.L.P.P. de (ed.) (1868), Cycadaceae. Prodromus Systematis Naturalis Regni Vegetabilis 16(2): 535 [comb. nov.]

basionym: Encephalartos spiralis var. diplomera F.Muell. legitimate

• Comment: A.D.Chapman, Austral. Pl. Name Index 1918 (1991) lists the name “Macrozamia spiralis var. diplomera Benth., nom. illeg, non A.DC.”, but this is a secondary reference, and not an attempt by Bentham to publish a new name.

Johnson, L.A.S. (1959), The families of cycads and the Zamiaceae of Australia. Proceedings of the Linnean Society of New South Wales 84: 98 [secondary reference]

Johnson, L.A.S. (1961), Zamiaceae. Contributions from the New South Wales National Herbarium, Flora Series 1: 31 [secondary reference]

Johnson, L.A.S. (1961), Zamiaceae. Contributions from the New South Wales National Herbarium, Flora Series 1: 31 [nomenclatural synonym]

nomenclatural synonym of: Macrozamia diplomera (F.Muell.) L.A.S.Johnson legitimate

Hill, K.D. in McCarthy, P.M. (ed.) (1998), Zamiaceae. Flora of Australia 48: 648 [nomenclatural synonym]

nomenclatural synonym of: Macrozamia diplomera (F.Muell.) L.A.S.Johnson legitimate

Council of Heads of Australasian Herbaria (2006), Australian Plant Census: - [nomenclatural synonym]

nomenclatural synonym of: Macrozamia diplomera (F.Muell.) L.A.S.Johnson legitimate

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