Kerrigan, R.A. (30 April 2012), A treatment for Polygala of northern Australia. Australian Systematic Botany 25(2): 120, 133, Figs 3I, 6D, 9F (map) [tax. nov.]

• Type: Kimberley, 7.6 km E along Gibb River Road from Beverley Springs turnoff, 12.v.2006, R.A. Kerrigan 1107; holo: DNA 176666!; iso: BRI, CANB, K, PERTH.

taxonomic synonym: Polygala sp. Ciliate alae (C.R.Michell 615) [n/a]

• Etymology: "Greek petra- (rock) and -philus (loving), rock lover because this species is always found among sandstone/laterite rubble on scree slopes."

Biggs, L.J. & Parker, C.M. (21 November 2013), Updates to Western Australia's vascular plant census for 2012. Nuytsia 23: 506 [secondary reference]

Council of Heads of Australasian Herbaria (2014), Australian Plant Census: - APC [secondary reference]

taxonomic synonym: Polygala sp. Ciliate alae (C.R.Michell 615) [n/a] taxonomic synonym: Polygala sp. Rock lover var. petrophila R.A.Kerrigan [n/a] taxonomic synonym: Polygala sp. Rock lover (C.R.Michell 615) R.A.Kerrigan [n/a]

• APC Dist.: WA, NT

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