Holttum, R.E. (1964), The tree-ferns of the genus Cyathea in Australasia and the Pacific. Blumea 12(2): 265 [tax. nov.]

Green, P.S. in Wilson, A.J.G. (ed.) (1994), Norfolk Island & Lord Howe Island. Flora of Australia 49: 582, Fig. 103N-O APC [secondary reference]

• Lectotype: "Lord Howe Island, C.Moore 1; holo: K."

nomenclatural synonym: Alsophila robusta C.Moore ex Maiden nom. illeg. nomenclatural synonym: Sphaeropteris robusta (Holttum) R.M.Tryon legitimate taxonomic synonym: Alsophila australis var. nigrescens Benth. legitimate

• APC Dist.: LHI

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 [secondary reference]

• Type: "Lord Howe Island, s. dat., C.Moore 1 (lecto: K 000061764*"

• Text: "Green (1994, p. 582) cited the type of the name Alsophila robusta as ‘Lord Howe Island, C.Moore 1; holo:K’. This is here treated as effective lectotypification by Green, in accordance with ICN Art. 7.11 (Turland et al. 2018). Because Green’s citation meets the relevant requirements of ICN Art. 7.11, his use of the term ‘holo’ is correctable under ICN Art. 9.10."

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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