Gardner, C.A. (26 July 1933), Contributiones Florae Australiae Occidentalis, VIII. Journal of the Royal Society of Western Australia 19: 86 [tax. nov.]

• Type: "Hamersley River, near the Eyre Range, in shady spots on the river banks; flowers white, blotched with pale lilac. 23rd September, 1925. Gardner 1886."

taxonomic synonym: Hybanthus bilobus C.A.Gardner nom. inval., nom. nud.

Bennett, E.M. (14 November 1972), A revision of the Australian species of Hybanthus Jacquin (Violaceae). Nuytsia 1(3): 240, Fig. 8 (map) [secondary reference]

• Type: "Hamersley River, near Eyre Range, 23 Sept. 1925, C.A. Gardner 1886 (holo: PERTH)."

taxonomic synonym: Hybanthus floribundus var. minutifolia F.Muell. legitimate

Adams, L.G. & George, A.S. in George, A.S. (ed.) (1982), Violaceae. Flora of Australia 8: 109 [taxonomic synonym]

taxonomic synonym of: Hybanthus epacroides (C.A.Gardner) Melch. legitimate

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

taxonomic synonym of: Hybanthus epacroides (C.A.Gardner) Melch. legitimate

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

taxonomic synonym of: Hybanthus epacroides (C.A.Gardner) Melch. 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: 30 [taxonomic synonym]

taxonomic synonym of: Pigea epacroides (C.A.Gardner) P.I.Forst. legitimate

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