Bentham, G. in Candolle, A.L.P.P. de (ed.) (1848), Labiatae. Prodromus Systematis Naturalis Regni Vegetabilis 12: 64 [tax. nov.]

• Type: "In Africa australi ad latera mont. Katriviersberg (Eckl.!)"

Conn, B.J. in Walsh, N.G. & Entwisle, T.J. (ed.) (1999), Lamiaceae. Flora of Victoria 4: 420-421, Fig. 81c [secondary reference]

National Herbarium of New South Wales (2009), PlantNET Flora of New South Wales Online: - [secondary reference]

common name: Cockspur Flower [n/a]

Council of Heads of Australasian Herbaria (2010), Australian Plant Census: - APC [secondary reference]

orthographic variant: Plectranthus eckloni Benth. orth. var.

• APC Dist.: NSW (doubtfully naturalised), Vic (naturalised)

Paton, A.J., Mwanyambo, M., Govaerts, R.H.A., Smitha, K., Suddee, S., Phillipson, P.B., Wilson, T.C., Forster, P.I. & Culham, A. (23 August 2019), Nomenclatural changes in Coleus and Plectranthus (Lamiaceae): a tale of more than two genera. Phytokeys 129: 133, Fig. 8F [secondary reference]

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