Hopper, S.D. & Brown, A.P. (22 June 2007), A revision of Australia's hammer orchids (Drakaea: Orchidaceae), with some field data on species-specific sexually deceived wasp pollinators. Australian Systematic Botany 20(3): 271-273, Figs 3, 5, 17, 18, 27 [tax. nov.]

• Type: Stirling Range National Park, 3 km ENE of Mondurup Peak, 34 24'S 117 51'E, 7 Oct. 1983, S.D. Hopper 3508, holo: PERTH 00232270; iso: AD, CANB, MEL

Brown, A., Dundas, P., Dixon, K. & Hopper, S. (2008), Orchids of Western Australia: 180 [secondary reference]

common name: Slender hammer orchid [n/a]

• Etymology: "thin, slender, alluding to the slender labellum"

Hoffman, N. & Brown, A. (2011), Orchids of South-West Australia Edn. 3: 235 [secondary reference]

common name: Slender Hammer Orchid [n/a]

• Etymology: "It is from the narrow nature of this labellum that the orchid gains its scientific name 'gracilis' meaning slender."

Miller, J.T. & Clements, M.A. (30 June 2014), Molecular phylogenetic analyses of Drakaeinae: Diurideae (Orchidaceae) based on DNA sequences of the internal transcribed spacer region. Australian Systematic Botany 27(1): 21 [secondary reference]

taxonomic synonym: Drakaea gracilis N.Hoffman & A.P.Br. nom. inval.

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: 27, 129 [secondary reference]

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

taxonomic synonym: Drakaea sp. A [n/a] taxonomic synonym: Drakaea gracilis N.Hoffman & A.P.Br. nom. inval. taxonomic synonym: Drakaea gracilis N.Hoffman & A.P.Br. nom. inval. taxonomic synonym: Drakaea gracilis Paczk. & A.R.Chapm. nom. inval. taxonomic synonym: Drakaea gracilis J.R.Wheeler, N.G.Marchant & M.Lewington nom. inval. taxonomic synonym: Drakaea sp. A Perth Flora [n/a]

• APC Dist.: WA

Jones, D.L. (January 2021), Native Orchids of Australia Edn. 3: 282 [secondary reference]

common name: Slender Hammer Orchid [n/a]

Brown, A. (19 July 2022), The Complete Orchids of Western Australia 1: 298 [secondary reference]

common name: Slender Hammer Orchid [n/a]

• Etymology: "From the Latin gracilis (thin, slender), referring to the narrow labellum."

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