Maiden, J.H. (1898), Observations on the vegetation of Lord Howe Island. Proceedings of the Linnean Society of New South Wales 23(2): 144 [tax. nov.]

• Type: "... cultivated in the Sydney Botanic Gardens for many years and herbarium specimens have been distributed from this establishment under that name..."

taxonomic synonym: Alsophila australis var. nigrescens Benth. legitimate

• Comment: nom. illeg., non de Vriese (1852).

Green, P.S. in Wilson, A.J.G. (ed.) (1994), Norfolk Island & Lord Howe Island. Flora of Australia 49: 582 [nomenclatural synonym]

nomenclatural synonym of: Cyathea robusta Holttum legitimate

Field, A.R. (2 January 2020), Classification and typification of Australian lycophytes and ferns based on Pteridophyte Phylogeny Group classification PPG I. Australian Systematic Botany 33(1): 37 [nomenclatural synonym]

nomenclatural synonym of: Sphaeropteris robusta (Holttum) R.M.Tryon legitimate

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