Domin, K. (1928), Beitrage zur Flora und Pflanzengeographie Australiens. Bibliotheca Botanica 22(89): 984 [comb. nov.]

basionym: Ionidium vernonii F.Muell. legitimate nomenclatural synonym: Hybanthus vernonii (F.Muell.) F.Muell. legitimate nomenclatural synonym: Calceolaria vernonii (F.Muell.) Kuntze legitimate

Bennett, E.M. (14 November 1972), A revision of the Australian species of Hybanthus Jacquin (Violaceae). Nuytsia 1(3): 238 [nomenclatural synonym]

nomenclatural synonym of: Hybanthus vernonii (F.Muell.) F.Muell. legitimate

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 210 [nomenclatural synonym]

nomenclatural synonym of: Hybanthus vernonii (F.Muell.) F.Muell. legitimate

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

nomenclatural synonym of: Hybanthus vernonii (F.Muell.) 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: 32 [nomenclatural synonym]

nomenclatural synonym of: Pigea vernonii (F.Muell.) P.I.Forst. legitimate

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