Britton, N.L. (1909), Bulletin of the Torrey Botanical Club: 561 [tax. nov.]

• Type: Harrisia gracilis (Miller) Britton

Telford, I.R.H. in George, A.S. (ed.) (1984), Cactaceae. Flora of Australia 4: 78 [secondary reference]

Brummitt, R.K. (1992), Vascular Plant Families and Genera: 163 [secondary reference]

taxonomic synonym: Eriocereus (A.Berger) Riccob. legitimate

Barthlott, W. & Hunt, D.R. in Kubitzki, K. (ed.) (1993), Cactaceae. The Families and Genera of Vascular Plants 2: 178 [secondary reference]

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

• APC Dist.: Qld (naturalised), NSW (naturalised)

Mabberley, D.J. (1 May 2008), Mabberley's Plant-Book Edn. 3: 392 [secondary reference]

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