Olde, P.M. & Marriott, N.R. (1994), New names and combinations in Grevillea (Proteaceae: Grevilleoideae). The Grevillea Book 1: 186 [comb. et stat. nov.]

basionym: Grevillea willisii subsp. pachylostyla McGill. legitimate

Olde, P.M. & Marriott, N.R. (1995), The Grevillea Book 3: 70-71 (Plate 52, fig., map) [secondary reference]

nomenclatural synonym: Grevillea willisii subsp. pachylostyla McGill. legitimate

• Etymology: "The specific epithet is derived from the Greek pachylos (thick) and stylus (a pillar), in reference to the thickened style."

Makinson, R.O. in Walsh, N.G. & Entwisle, T.J. (ed.) (1996), Grevillea. Flora of Victoria 3: 862-863, Fig. 175c [secondary reference]

nomenclatural synonym: Grevillea willisii subsp. pachylostyla McGill. legitimate

Makinson, R.O. in Wilson, A.J.G. (ed.) (2000), Grevillea. Flora of Australia 17A: 59, Map 14 [secondary reference]

nomenclatural synonym: Grevillea willisii subsp. pachylostyla McGill. legitimate

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

nomenclatural synonym: Grevillea willisii subsp. pachylostyla McGill. legitimate pro parte taxonomic synonym: Grevillea sp. (Rock Grevillea) [n/a]

• APC Comment: Collections are known which are intermediate between G. willisii and G. pachylostyla.
• APC Dist.: Vic

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