Domin, K. (1928), Beitrage zur Flora und Pflanzengeographie Australiens. Bibliotheca Botanica 22(89): 984-985 [comb. nov.]

basionym: Ionidium monopetalum Schult. legitimate nomenclatural synonym: Pigea monopetala (Schult.) Ging. ex DC. legitimate nomenclatural synonym: Solea monopetala (Schult.) Spreng. legitimate nomenclatural synonym: Calceolaria monopetala (Schult.) Hochr. ex Britten nom. inval., nom. nud. taxonomic synonym: Viola monopetala Schult. nom. inval., pro syn. taxonomic synonym: Pigea filiformis Ging. legitimate taxonomic synonym: Ionidium filiforme (Ging.) F.Muell. legitimate taxonomic synonym: Hybanthus filiformis (Ging.) F.Muell. legitimate taxonomic synonym: Calceolaria filiformis (Ging.) Kuntze legitimate

Bennett, E.M. (14 November 1972), A revision of the Australian species of Hybanthus Jacquin (Violaceae). Nuytsia 1(3): 234-235, Fig. 6 (map) [secondary reference]

nomenclatural synonym: Ionidium monopetalum Schult. legitimate nomenclatural synonym: Solea monopetala (Schult.) Spreng. legitimate nomenclatural synonym: Pigea monopetala (Schult.) Ging. ex DC. legitimate nomenclatural synonym: Calceolaria monopetala (Schult.) Hochr. ex Britten nom. inval., nom. nud. taxonomic synonym: Pigea filiformis Ging. legitimate taxonomic synonym: Ionidium linearioides C.Presl legitimate taxonomic synonym: Ionidium filiforme (Ging.) F.Muell. legitimate taxonomic synonym: Hybanthus filiformis (Ging.) F.Muell. legitimate taxonomic synonym: Hybanthus tatei F.Muell. ex Tate legitimate taxonomic synonym: Calceolaria tatei (Tate) Kuntze legitimate taxonomic synonym: Calceolaria filiformis (Ging.) Kuntze legitimate taxonomic synonym: Hybanthus monopetalus var. abbreviatus Domin legitimate taxonomic synonym: Hybanthus monopetalus var. normalis Domin nom. inval.

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

nomenclatural synonym: Ionidium monopetalum Schult. legitimate

Cunningham, G.M., Mulham, W.E., Milthorpe, P.L. & Leigh, J.H. (1981), Plants of Western New South Wales: 502 [secondary reference]

common name: Slender Violet-bush [n/a] common name: Slender Violet [n/a]

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

taxonomic synonym: Hybanthus filiformis (Ging.) F.Muell. legitimate taxonomic synonym: Hybanthus monopetalus var. abbreviatus Domin legitimate taxonomic synonym: Hybanthus monopetalus var. normalis Domin nom. inval.

Adams, L.G. & George, A.S. in George, A.S. (ed.) (1982), Violaceae. Flora of Australia 8: 104-105, Map 110 [secondary reference]

nomenclatural synonym: Ionidium monopetalum Schult. legitimate nomenclatural synonym: Solea monopetala (Schult.) Spreng. legitimate nomenclatural synonym: Pigea monopetala (Schult.) Ging. ex DC. legitimate nomenclatural synonym: Calceolaria monopetala (Schult.) Hochr. ex Britten nom. inval., nom. nud. nomenclatural synonym: Hybanthus monopetalus var. normalis Domin nom. inval. taxonomic synonym: Pigea filiformis Ging. legitimate taxonomic synonym: Ionidium linearioides C.Presl legitimate taxonomic synonym: Ionidium filiforme (Ging.) F.Muell. legitimate taxonomic synonym: Hybanthus filiformis (Ging.) F.Muell. legitimate taxonomic synonym: Hybanthus tatei F.Muell. ex Tate legitimate taxonomic synonym: Calceolaria tatei (Tate) Kuntze legitimate taxonomic synonym: Calceolaria filiformis (Ging.) Kuntze legitimate taxonomic synonym: Hybanthus monopetalus var. abbreviatus Domin legitimate

Williams, K.A.W. (1984), Native Plants of Queensland 2: 160 [secondary reference]

Stanley, T.D. in Stanley, T.D. & Ross, E.M. (1986), Violaceae. Flora of South-eastern Queensland 2: 100, Fig. 13G [secondary reference]

nomenclatural synonym: Ionidium monopetalum Schult. legitimate taxonomic synonym: Ionidium filiforme (Ging.) F.Muell. legitimate taxonomic synonym: Hybanthus monopetalus var. abbreviatus Domin legitimate taxonomic synonym: Hybanthus monopetalus var. normalis Domin nom. inval. common name: Lady's Slipper [n/a]

James, T.A. in Harden, G.J. (ed.) (1990), Violaceae. Flora of New South Wales 1: 439, Plate 25 [secondary reference]

common name: Slender Violet-bush [n/a]

Entwisle, T.J. in Walsh, N.G. & Entwisle, T.J. (ed.) (1996), Violaceae. Flora of Victoria 3: 368, Fig. 75c [secondary reference]

nomenclatural synonym: Ionidium monopetalum Schult. legitimate common name: Slender Violet-bush [n/a]

James, T.A. in Harden, G.J. (ed.) (2000), Violaceae. Flora of New South Wales Revised Edition 1: 439, Plate 25 [secondary reference]

common name: Slender Violet-bush [n/a]

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

nomenclatural synonym: Viola monopetala Schult. nom. inval., pro syn. nomenclatural synonym: Ionidium monopetalum Schult. legitimate nomenclatural synonym: Solea monopetala (Schult.) Spreng. legitimate nomenclatural synonym: Pigea monopetala (Schult.) Ging. ex DC. legitimate nomenclatural synonym: Calceolaria monopetala (Schult.) Hochr. ex Britten nom. inval., nom. nud. nomenclatural synonym: Hybanthus monopetalus (Schult.) Domin var. monopetalus legitimate nomenclatural synonym: Hybanthus monopetalus var. normalis Domin nom. inval. taxonomic synonym: Jonidium monopetalum Schult. orth. var. taxonomic synonym: Pigea filiformis Ging. legitimate taxonomic synonym: Ionidium linearioides C.Presl legitimate taxonomic synonym: Ionidium linaroides F.Muell. orth. var. taxonomic synonym: Ionidium filiforme (Ging.) F.Muell. legitimate taxonomic synonym: Hybanthus filiformis (Ging.) F.Muell. legitimate taxonomic synonym: Hybanthus tatei F.Muell. nom. inval., nom. nud. taxonomic synonym: Hybanthus tatei Tate nom. inval., nom. nud. taxonomic synonym: Hybanthus tatei F.Muell. ex Tate legitimate taxonomic synonym: Calceolaria tatei (Tate) Kuntze legitimate taxonomic synonym: Calceolaria filiformis (Ging.) Kuntze legitimate taxonomic synonym: Jonidium linarioides Domin orth. var. taxonomic synonym: Jonidium filiforme Domin orth. var. taxonomic synonym: Hybanthus monopetalus var. abbreviatus Domin legitimate

• APC Dist.: SA, Qld, NSW, Vic

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

Brown, G.K. (December 2021), Appendix A: New names and name and status changes 2020 to 2021. Introduction to the Census of the Queensland Flora 2021: 13 [nomenclatural synonym]

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

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