Mueller, F.J.H. von (1878), Fragmenta Phytographiae Australiae 11(88): 4 [tax. nov.]

• Type: "In silvis Karri-forests secus flumen Shannon; F.M."

taxonomic synonym: Ionidium debilissimum F.Muell. nom. inval., pro syn.

Mueller, F.J.H. von (1882), Systematic Census of Australian Plants: 6 [secondary reference]

Mueller, F.J.H. von (December 1889), Second Systematic Census of Australian Plants: 11 [secondary reference]

Kuntze, C.E.O. (5 November 1891), Revisio Generum Plantarum 1: 41 [basionym]

basionym of: Calceolaria debilissima (F.Muell.) Kuntze legitimate

Bennett, E.M. (14 November 1972), A revision of the Australian species of Hybanthus Jacquin (Violaceae). Nuytsia 1(3): 235-236, Fig. 6 (map) [secondary reference]

• Type: "In silvis Karri-forests secus flumen Shannon; (W.A), F. Mueller. (holo.: MEL; iso.: AD)."

nomenclatural synonym: Calceolaria debilissima (F.Muell.) Kuntze legitimate

Adams, L.G. & George, A.S. in George, A.S. (ed.) (1982), Violaceae. Flora of Australia 8: 106-107, Map 115 [secondary reference]

nomenclatural synonym: Calceolaria debilissima (F.Muell.) Kuntze legitimate

Green, J.W. (1985), Census of the Vascular Plants of Western Australia Edn. 2: 118 [secondary reference]

Wheeler, J.R. in Marchant, N.G., Wheeler, J.R., Rye, B.L., Bennett, E.M., Lander, N.S. & Macfarlane, T.D. (1987), Violaceae. Flora of the Perth Region 1: 155 [secondary reference]

Wheeler, J.R., Marchant, N.G. & Lewington, M. (2002), Dicotyledons. Flora of the South West 2: 934 [secondary reference]

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

nomenclatural synonym: Calceolaria debilissima (F.Muell.) Kuntze legitimate taxonomic synonym: Ionidium debilissimum F.Muell. nom. inval., pro syn.

• APC Dist.: WA

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 [basionym]

basionym of: Pigea debilissima (F.Muell.) P.I.Forst. legitimate

Parker, C.M. & Percy-Bower, J.M. (22 March 2024), Updates to Western Australia’s vascular plant census for 2023. Nuytsia 35: 5 [nomenclatural synonym]

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

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