Hopper, S.D. (31 August 1989), New subspecies of Banksia seminuda and B. occidentalis (Proteaceae) from the south coast of Western Australia. Nuytsia 7(1): 21-23, Fig. 4a [tax. nov.]

• Type: "Black Point, proposed Shannon-D'Entrecasteaux National Park, 2 Aug. 1987, S.D. Hopper 5937 (holo: PERTH; iso: AD, CANB, K, MEL, NSW, PERTH)."

• Etymology: "From the Latin formosus (finely formed, beautiful), alluding to the beauty and horticultural potential of the subspecies."

Hopper, S.D., van Leeuwen, S.J., Brown, A.P. & Patrick, S.J. (1990), Western Australia's Endangered Flora: 108, 129 [secondary reference]

George, A.S. in Wilson, A.J.G. (ed.) (1999), Banksia. Flora of Australia 17B: 234 [taxonomic synonym]

taxonomic synonym of: Banksia occidentalis R.Br. legitimate

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

taxonomic synonym of: Banksia occidentalis R.Br. legitimate

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