Wilson, Paul G. (10 December 1970), A taxonomic revision of the genera Crowea, Eriostemon and Phebalium (Rutaceae). Nuytsia 1(1): 30, Map 5 [comb. et stat. nov.]

basionym: Eriostemon difformis var. smithianus Benth. legitimate

• Etymology: "smithianus, a manuscript epithet of W. Hill, Brisbane."

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 192 [secondary reference]

nomenclatural synonym: Eriostemon difformis var. smithianus Benth. legitimate

Ross, E.M. in Stanley, T.D. & Ross, E.M. (1984), Rutaceae. Flora of South-eastern Queensland 1: 465-466, Fig. 71L [secondary reference]

nomenclatural synonym: Eriostemon difformis var. smithianus Benth. legitimate taxonomic synonym: Eriostemon parvifolius R.Br. ex Benth. legitimate

Williams, K.A.W. (1987), Native Plants of Queensland 3: 116 [secondary reference]

Weston, P.H. & Porteners, M.F. in Harden, G.J. (ed.) (1991), Eriostemon. Flora of New South Wales 2: 251 [secondary reference]

Wilson, Paul G. (16 September 1998), A taxonomic review of the genera Eriostemon and Philotheca (Rutaceae: Boronieae). Nuytsia 12(2): 251 [nomenclatural synonym]

nomenclatural synonym of: Philotheca difformis subsp. smithiana (Benth.) Paul G.Wilson legitimate

Williams, K.A.W. (1999), Native Plants of Queensland 4: 180 [secondary reference]

Jessup, L.W. (2003), Flora of South-eastern Queensland Volume 1 Changes to names or status of taxa: - [nomenclatural synonym]

nomenclatural synonym of: Philotheca difformis subsp. smithiana (Benth.) Paul G.Wilson legitimate

Council of Heads of Australasian Herbaria (2007), Australian Plant Census: - [nomenclatural synonym]

nomenclatural synonym of: Philotheca difformis subsp. smithiana (Benth.) Paul G.Wilson legitimate

Wilson, Paul G. in Wilson, A.J.G. (ed.) (2013), Philotheca. Flora of Australia 26: 379 [nomenclatural synonym]

nomenclatural synonym of: Philotheca difformis subsp. smithiana (Benth.) Paul G.Wilson legitimate

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