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

basionym: Pigea glauca Endl. legitimate

Bentham, G. (30 May 1863), Flora Australiensis 1: 104 [taxonomic synonym]

taxonomic synonym of: Ionidium calycinum (DC.) Steud. legitimate

Bennett, E.M. (14 November 1972), A revision of the Australian species of Hybanthus Jacquin (Violaceae). Nuytsia 1(3): 236 [taxonomic synonym]

taxonomic synonym of: Hybanthus calycinus (DC.) F.Muell. legitimate

Adams, L.G. & George, A.S. in George, A.S. (ed.) (1982), Violaceae. Flora of Australia 8: 105 [taxonomic synonym]

taxonomic synonym of: Hybanthus calycinus (DC.) 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: 29 [taxonomic synonym]

taxonomic synonym of: Pigea calycina DC. legitimate

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