Nicholls, W.H. (1945), A new Queensland Phreatia (Orchidaceae). The Victorian Naturalist 61: 151 [tax. nov.]

• Type: "Mount Bartle Frere (via Ingham) (A. Glindeman) ... The TYPE material (from Mount Bartle Frere) is in the present writer's herbarium."

taxonomic synonym: Oberonia crassiuscula Nicholls nom. inval., pro syn.

• Etymology: "I have adopted Mueller's Herbarium name crassiuscula for this plant. It is, I consider, an eminently fitting one, referring as it does to its salient characteristic, namely, the thick fleshy Crassula-like foliage."

Dockrill, A.W. (1969), Australian Indigenous Orchids: 660-661 [secondary reference]

taxonomic synonym: Phreatia limenophylax (Endl.) Benth. legitimate taxonomic synonym: Oberonia crassiuscula Dockrill nom. inval., pro syn.

Jones, D.L. (1988), Native Orchids of Australia: 610 [secondary reference]

Clements, M.A. in Jones, D.L. (ed.) (August 1989), Catalogue of Australian Orchidaceae. Australian Orchid Research 1: 107 [secondary reference]

Dockrill, A.W. (1993), Australian Indigenous Orchids Edn. 2, 1: 336-337, Pl. 46 [secondary reference]

taxonomic synonym: Oberonia crassiuscula Dockrill nom. inval., pro syn. pro parte taxonomic synonym: Phreatia limenophylax (Endl.) Benth. legitimate

Hyland, B.P.M., Gray, B. & Elick, R.W. in Cooper, W.E. & Cooper, W.T. (1994), Appendix I: Provisional Species List. Fruits of the Rainforest: 309 [secondary reference]

Jones, D.L. & Clements, M.A. (June 2004), Miscellaneous new species, new genera, reinstated genera and new combinations in Australian Orchidaceae. The Orchadian, Scientific Supplement 14(8): xiv [basionym]

basionym of: Plexaure crassiuscula (Nicholls) M.A.Clem. & D.L.Jones legitimate

Council of Heads of Australasian Herbaria (28 February 2018), Australian Plant Census: - [nomenclatural synonym]

nomenclatural synonym of: Plexaure crassiuscula (Nicholls) M.A.Clem. & D.L.Jones legitimate

Jones, D.L. (January 2021), Native Orchids of Australia Edn. 3: 758 [secondary reference]

nomenclatural synonym: Plexaure crassiuscula (Nicholls) M.A.Clem. & D.L.Jones legitimate common name: Green Caterpillar Orchid [n/a]

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