Bennett, E.M. (14 November 1972), A revision of the Australian species of Hybanthus Jacquin (Violaceae). Nuytsia 1(3): 236-238, Fig. 7, 8 (map) [tax. nov.]

• Type: "8 miles E. of Margaret River townsite on banks of Margaret River, W.A., 17 Nov. 1968, E.M. Bennett 2815 (holo: PERTH)."

Adams, L.G. & George, A.S. in George, A.S. (ed.) (1982), Violaceae. Flora of Australia 8: 107, Map 116 APC [secondary reference]

• APC Dist.: WA

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

Hopper, S.D., van Leeuwen, S.J., Brown, A.P. & Patrick, S.J. (1990), Western Australia's Endangered Flora: 115, 126 [secondary reference]

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

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: 33 [basionym]

basionym of: Pigea volubilis (E.M.Benn.) 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: 6 [nomenclatural synonym]

nomenclatural synonym of: Pigea volubilis (E.M.Benn.) P.I.Forst. legitimate

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