Lindley, J. (1 January 1840), A Sketch of the Vegetation of the Swan River Colony: liii, adnot. [253] [tax. nov.]

• Type: (not cited).

Lindley, J. (January 1840), The Genera and Species of Orchidaceous Plants: 388 [secondary reference]

Endlicher, S.F.L. in Lehmann, J.G.C. (ed.) (1846), Orchideae. Plantae Preissianae 2(1): 5 [secondary reference]

Bentham, G. (23 September 1873), Flora Australiensis 6: 357 [secondary reference]

misapplication: Pterostylis barbata Lindl. legitimate by Endlicher, S.F.L. in Lehmann, J.G.C. (ed.) (1846), Orchideae. Plantae Preissianae 2(1): 5

Bentham, G. (23 September 1873), Flora Australiensis 6: 359 [misapplied]

misapplied to: Pterostylis reflexa R.Br. legitimate by Endlicher, S.F.L. in Lehmann, J.G.C. (ed.) (1846), Orchideae. Plantae Preissianae 2(1): 5

Sargent, O.H. (1906), Orchids occurring in York. Journal of the West Australian Natural History Society 2(3): 11 [secondary reference]

Ewart, A.J., Rees, B. & Wood, B. (March 1912), Contributions to the Flora of Australia, No. 17. Proceedings of the Royal Society of Victoria 24(1): 72 [basionym]

basionym of: Pterostylis nana var. pyramidalis (Lindl.) Ewart, B.Rees & B.Wood legitimate

Domin, K. (18 December 1912), Additions to the Flora of Western and North-Western Australia. Journal of the Linnean Society, Botany 41: 250 [basionym]

basionym of: Pterostylis nana var. pyramidalis (Lindl.) Domin isonym

George, A.S. (5 May 1971), A check list of the Orchidaceae of Western Australia. Nuytsia 1(2): 190 [secondary reference]

• Type: "Swan river, Drummond – holo.: K-L."

George, A.S. (5 May 1971), A check list of the Orchidaceae of Western Australia. Nuytsia 1(2): 190 [misapplied]

misapplied to: Pterostylis scabra var. robusta (R.S.Rogers) A.S.George legitimate by Endlicher, S.F.L. in Lehmann, J.G.C. (ed.) (1846), Orchideae. Plantae Preissianae 2(1): 5

George, A.S. (5 May 1971), A check list of the Orchidaceae of Western Australia. Nuytsia 1(2): 190 [taxonomic synonym]

taxonomic synonym of: Pterostylis nana R.Br. legitimate

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 32 [taxonomic synonym]

taxonomic synonym of: Pterostylis nana R.Br. legitimate

Rye, B.L. in Marchant, N.G., Wheeler, J.R., Rye, B.L., Bennett, E.M., Lander, N.S. & Macfarlane, T.D. (1987), Orchidaceae. Flora of the Perth Region 2: 837 [taxonomic synonym]

taxonomic synonym of: Pterostylis nana R.Br. legitimate

Jones, D.L. (1988), Native Orchids of Australia: 205 [secondary reference]

common name: Leafy Snail Greenhood [n/a]

Clements, M.A. in Jones, D.L. (ed.) (August 1989), Catalogue of Australian Orchidaceae. Australian Orchid Research 1: 126 [secondary reference]

nomenclatural synonym: Pterostylis nana var. pyramidalis (Lindl.) Domin isonym nomenclatural synonym: Pterostylis nana var. pyramidalis (Lindl.) Ewart, B.Rees & B.Wood legitimate

Hoffman, N. & Brown, A. (1992), Orchids of South-West Australia Edn. 2: 344 [secondary reference]

common name: Tall Snail Orchid [n/a]

Hoffman, N. & Brown, A. (1998), Orchids of South-West Australia Edn. 2 (revised): 344 [secondary reference]

common name: Tall Snail Orchid [n/a]

Paczkowska, G. & Chapman, A.R. (2000), The Western Australian Flora, a descriptive catalogue: 89 [secondary reference]

common name: Snail Orchid [n/a]

Jones, D.L. & Clements, M.A. in Banks, D.P. (ed.) (28 November 2002), A new classification of Pterostylis R.Br. (Orchidaceae). Australian Orchid Research 4: 75 [basionym]

basionym of: Linguella pyramidalis (Lindl.) D.L.Jones & M.A.Clem. legitimate

Jones, D.L., Clements, M.A. & Molloy, B.P.J. in Banks, D.P. (ed.) (28 November 2002), A synopsis of the subtribe Pterostylidinae. Australian Orchid Research 4: 131 [nomenclatural synonym]

nomenclatural synonym of: Linguella pyramidalis (Lindl.) D.L.Jones & M.A.Clem. legitimate

Brown, A., Dundas, P., Dixon, K. & Hopper, S. (2008), Orchids of Western Australia: 268 [secondary reference]

common name: Tall snail orchid [n/a]

• Etymology: "pyramidal, alluding to the arrangement of the leaves"

Hoffman, N. & Brown, A. (2011), Orchids of South-West Australia Edn. 3: 405 [secondary reference]

common name: Tall Snail Orchid [n/a]

Barrett, Russell & Tay, Eng Pin (2016), Perth Plants: a Field Guide to the Bushland and Coastal Flora of Kings Park and Bold Park Edn. 2: 240 [secondary reference]

Backhouse, G.N., Bates, R.J., Brown, A.P. & Copeland, L.M. (1 March 2016), Checklist of the orchids of Australia including its island territories: 39, 132 [secondary reference]

Jones, D.L. & Clements, M.A. (2017), New combinations in Australian Orchidaceae. Australian Orchid Review 82(2): 63 [basionym]

basionym of: Diplodium pyramidalis (Lindl.) D.L.Jones & M.A.Clem. legitimate

Council of Heads of Australasian Herbaria (28 February 2018), Australian Plant Census: - APC [secondary reference]

nomenclatural synonym: Pterostylis nana var. pyramidalis (Lindl.) Domin isonym nomenclatural synonym: Pterostylis nana var. pyramidalis (Lindl.) Ewart, B.Rees & B.Wood legitimate nomenclatural synonym: Linguella pyramidalis (Lindl.) D.L.Jones & M.A.Clem. legitimate nomenclatural synonym: Diplodium pyramidalis (Lindl.) D.L.Jones & M.A.Clem. legitimate misapplication: Pterostylis nana R.Br. legitimate by Gardner, C.A. (1930), Part I. Pteridophyta-Proteaceae. Enumeratio Plantarum Australiae Occidentalis: 23 misapplication: Pterostylis nana R.Br. legitimate by Green, J.W. (1985), Census of the Vascular Plants of Western Australia Edn. 2: 56

• APC Dist.: WA

Percy-Bower, J.M. & Parker, C.M. (28 March 2019), Updates to Western Australia’s vascular plant census for 2018. Nuytsia 30: 13 [secondary reference]

taxonomic synonym: Pterostylis sp. cauline leaves (N.Gibson & M.N.Lyons 1490) WA Herbarium [n/a]

Jones, D.L. (January 2021), Native Orchids of Australia Edn. 3: 506 [nomenclatural synonym]

nomenclatural synonym of: Diplodium pyramidalis (Lindl.) D.L.Jones & M.A.Clem. legitimate

Brown, A. (19 July 2022), The Complete Orchids of Western Australia 2: 154 [secondary reference]

common name: Tall Snail Orchid [n/a]

• Etymology: "From the Latin pyramidalis (pyramidal, pyramid-shaped), in reference to the leaves being large at the base and progressively smaller up the flowering stem."

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