Lindley, J. (1 January 1840), A Sketch of the Vegetation of the Swan River Colony: xlix. [comb. et stat. nov.]

• Type: "(not cited). [given by A.S.George, Nuytsia 1 (1971) 194 as "Swan River, Drummond – holo.: K-L;"]."

Domin, K. (1915), Beitrage zur Flora und Pflanzengeographie Australiens. Bibliotheca Botanica 20(85): 545 [taxonomic synonym]

taxonomic synonym of: Thelymitra longifolia J.R.Forst. & G.Forst. legitimate

George, A.S. (5 May 1971), A check list of the Orchidaceae of Western Australia. Nuytsia 1(2): 194 [secondary reference]

Jones, D.L. (1988), Native Orchids of Australia: 296 [secondary reference]

Ross, E.M. in Stanley, T.D. & Ross, E.M. (1989), Orchidaceae. Flora of South-eastern Queensland 3: 392 [taxonomic synonym]

taxonomic synonym of: Thelymitra nuda R.Br. legitimate

Clements, M.A. in Jones, D.L. (ed.) (August 1989), Catalogue of Australian Orchidaceae. Australian Orchid Research 1: 140 [secondary reference]

Hoffman, N. & Brown, A. (1992), Orchids of South-West Australia Edn. 2: 265 [secondary reference]

common name: Shy Sun Orchid [n/a]

Hoffman, N. & Brown, A. (1998), Orchids of South-West Australia Edn. 2 (revised): 265 [secondary reference]

common name: Shy Sun Orchid [n/a]

Jones, D.L. & Clements, M.A. (March 1998), Two new species, characterisation of two poorly known species and a new name in Thelymitra J.R. & G.Forst. (Orchidaceae) from Australia. The Orchadian 12(7): 331 [secondary reference]

Paczkowska, G. & Chapman, A.R. (2000), The Western Australian Flora, a descriptive catalogue: 91 [secondary reference]

Western Australian Herbarium (2003), FloraBase: the Western Australian Flora Version 2: - [secondary reference]

Brown, A., Dundas, P., Dixon, K. & Hopper, S. (2008), Orchids of Western Australia: 330 [secondary reference]

common name: Shy sun orchid [n/a]

• Etymology: "of grass, alluding to the grasslike leaf"

Hoffman, N. & Brown, A. (2011), Orchids of South-West Australia Edn. 3: 321 [secondary reference]

common name: Shy Sun Orchid [n/a]

Jeanes, J.A. (2013), An overview of the Thelymitra nuda (Orchidaceae) complex in Australia including the description of six new species. Muelleria 31: 22-23, Figs 3e, 4e (map) [secondary reference]

Parker, C.M. (10 March 2015), Updates to Western Australia's vascular plant census for 2014. Nuytsia 25: 23 [secondary reference]

taxonomic synonym: Thelymitra sp. Slender Sun Orchid (A.R.Annels 2884) [n/a] taxonomic synonym: Thelymitra sp. Brookton (A.S.George 11631) [n/a]

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: 49, 134 [secondary reference]

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

taxonomic synonym: Thelymitra sp. Slender Sun Orchid (A.R.Annels 2884) [n/a] taxonomic synonym: Thelymitra sp. Brookton (A.S.George 11631) [n/a] pro parte misapplication: Thelymitra holmesii Nicholls legitimate by Clements, M.A. in Jones, D.L. (ed.) (August 1989), Catalogue of Australian Orchidaceae. Australian Orchid Research 1: 140

• APC Dist.: WA

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

misapplied to: Thelymitra vulgaris Jeanes legitimate by Hoffman, N. & Brown, A. (1992), Orchids of South-West Australia Edn. 2: 265

[misapplied]

misapplied to: Thelymitra vulgaris Jeanes legitimate by Hoffman, N. & Brown, A. (1998), Orchids of South-West Australia Edn. 2 (revised): 265

Jones, D.L. (January 2021), Native Orchids of Australia Edn. 3: 427 [secondary reference]

common name: Coy Sun Orchid [n/a]

Brown, A. (19 July 2022), The Complete Orchids of Western Australia 2: 244 [secondary reference]

common name: Shy Sun Orchid [n/a]

• Etymology: "From the Latin gramineus (of grass, grass-like), in reference to the narrow leaf."

---