Steudel, E.G. von (1840), Nomenclator Botanicus Edn. 2, 1(7): 813 [comb. nov.]

basionym: Pigea banksiana Ging. ex DC. legitimate

Domin, K. (1928), Beitrage zur Flora und Pflanzengeographie Australiens. Bibliotheca Botanica 22(89): 983 [nomenclatural synonym]

nomenclatural synonym of: Hybanthus enneaspermus var. banksianus (Ging. ex DC.) Domin legitimate

Bennett, E.M. (14 November 1972), A revision of the Australian species of Hybanthus Jacquin (Violaceae). Nuytsia 1(3): 228 [taxonomic synonym]

taxonomic synonym of: Hybanthus enneaspermus (L.) F.Muell. subsp. enneaspermus legitimate

Adams, L.G. & George, A.S. in George, A.S. (ed.) (1982), Violaceae. Flora of Australia 8: 103 [taxonomic synonym]

taxonomic synonym of: Hybanthus enneaspermus (L.) F.Muell. subsp. enneaspermus legitimate

Council of Heads of Australasian Herbaria (2005), Australian Plant Census: - [taxonomic synonym]

taxonomic synonym of: Hybanthus enneaspermus (L.) F.Muell. legitimate

Council of Heads of Australasian Herbaria (2010), Australian Plant Census: - [taxonomic synonym]

taxonomic synonym of: Hybanthus enneaspermus (L.) F.Muell. legitimate

Forster, P.I. (24 March 2021), Reinstatement of Pigea Ging., an earlier generic name for the spade flowers previously included in Afrohybanthus Flicker (Violaceae). Austrobaileya 11: 30 [taxonomic synonym]

taxonomic synonym of: Pigea enneasperma (L.) P.I.Forst. legitimate

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

taxonomic synonym of: Afrohybanthus enneaspermus (L.) Flicker legitimate

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