Schultes, J.A. (1819), Systema Vegetabilium Edn. 16, 5: 400 [tax. nov.]

• Type: "Ex Anglia habuit in Herbario suo."

taxonomic synonym: Viola monopetala Schult. nom. inval., pro syn.

Candolle, A.P. de in Candolle, A.P. de (ed.) (1824), Violarieae. Prodromus Systematis Naturalis Regni Vegetabilis 1: 307 [basionym]

basionym of: Pigea monopetala (Schult.) Ging. ex DC. legitimate

Sprengel, C.P.J. (1824), Systema Vegetabilium Edn. 17, 1: 804 [basionym]

basionym of: Solea monopetala (Schult.) Spreng. legitimate

Bentham, G. (30 May 1863), Flora Australiensis 1: 103 [secondary reference]

Britten, J. in Banks, J. & Solander, D.C. (1900), Illustrations of Australian plants collected in 1770 during Captain Cook's voyage round the world 1: 7, [basionym]

basionym of: Calceolaria monopetala (Schult.) Hochr. ex Britten nom. inval., nom. nud.

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

basionym of: Hybanthus monopetalus (Schult.) Domin legitimate

Bennett, E.M. (14 November 1972), A revision of the Australian species of Hybanthus Jacquin (Violaceae). Nuytsia 1(3): 234 [secondary reference]

• Type: "Ex anglia habuit Römer in Herbario suo." (holo.; probably once at L.Z., if so now destroyed: ?iso.: BM)."

Bennett, E.M. (14 November 1972), A revision of the Australian species of Hybanthus Jacquin (Violaceae). Nuytsia 1(3): 234 [nomenclatural synonym]

nomenclatural synonym of: Hybanthus monopetalus (Schult.) Domin legitimate

Bennett, E.M. & George, A.S. in Jessop, J.P. (ed.) (1981), Viiolaceae. Flora of Central Australia: 223 [nomenclatural synonym]

nomenclatural synonym of: Hybanthus monopetalus (Schult.) Domin legitimate

Adams, L.G. & George, A.S. in George, A.S. (ed.) (1982), Violaceae. Flora of Australia 8: 104 [nomenclatural synonym]

nomenclatural synonym of: Hybanthus monopetalus (Schult.) Domin legitimate

Stanley, T.D. in Stanley, T.D. & Ross, E.M. (1986), Violaceae. Flora of South-eastern Queensland 2: 100 [nomenclatural synonym]

nomenclatural synonym of: Hybanthus monopetalus (Schult.) Domin legitimate

Entwisle, T.J. in Walsh, N.G. & Entwisle, T.J. (ed.) (1996), Violaceae. Flora of Victoria 3: 368 [nomenclatural synonym]

nomenclatural synonym of: Hybanthus monopetalus (Schult.) Domin legitimate

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

orthographic variant: Jonidium monopetalum Schult. orth. var.

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

nomenclatural synonym of: Hybanthus monopetalus (Schult.) Domin 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: 31 [nomenclatural synonym]

nomenclatural synonym of: Pigea monopetala (Schult.) Ging. ex DC. legitimate

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