Bentham, G. in Hooker, W.J. (ed.) (December 1841), Notes on Mimoseae with a short synopsis of species. The Journal of Botany 4(31): 355-356 [tax. nov.]

• Type: "Australia, Bauer, Mitchell."

Bentham, G. (5 October 1864), Flora Australiensis 2: 300 [secondary reference]

Mueller, F.J.H. von (1882), Systematic Census of Australian Plants: 43 [secondary reference]

Diels, F.L.E. & Pritzel, E.G. (6 December 1904), Fragmenta Phytographiae Australiae occidentalis. Beitrage zur Kenntnis der Pflanzen Westaustraliens, ihrer Verbreitung und ihrer Lebensverhaltnisse. Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 35(2-3): 276 [secondary reference]

Dixon, W.A. (1906), The Plants of New South Wales: 118 [secondary reference]

Bailey, F.M. (1913), Comprehensive Catalogue of Queensland Plants: 154 [secondary reference]

common name: Native Sensitive-plant [n/a]

Sulman, F. (1914), A Popular Guide to the Wild Flowers of New South Wales II: 47 [secondary reference]

Domin, K. (1926), Beitrage zur Flora und Pflanzengeographie Australiens. Bibliotheca Botanica 22(89): 802 [secondary reference]

Chippendale, G.M. & Murray, L.R. (1963), Poisonous Plants of the Northern Territory: 64, Fig. 32 [secondary reference]

common name: Native Sensitive Plant [n/a]

Windler, D.R. (1966), A revision of the genus Neptunia (Leguminosae). Australian Journal of Botany 14(3): 412-416 [secondary reference]

Cunningham, G.M., Mulham, W.E., Milthorpe, P.L. & Leigh, J.H. (1981), Plants of Western New South Wales: 375-376 [secondary reference]

common name: Sensitive Plant [n/a] common name: Native Sensitive Plant [n/a]

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 151 [secondary reference]

Pedley, L. in Stanley, T.D. & Ross, E.M. (1984), Mimosaceae. Flora of South-eastern Queensland 1: 333, 335, Fig. 56E [secondary reference]

common name: Native Sensitive Plant [n/a]

Green, J.W. (1985), Census of the Vascular Plants of Western Australia Edn. 2: 90 [secondary reference]

Dunlop, C.R. (1987), Checklist of the Vascular Plants of the Northern Territory. Technical Report: Conservation Commission of the Northern Territory 26: 51 [secondary reference]

Murray, L. in Harden, G.J. (ed.) (1991), Neptunia. Flora of New South Wales 2: 327 [secondary reference]

common name: Sensitive Plant [n/a]

Wheeler, J.R. in Wheeler, J.R. (ed.) (1992), Mimosaceae. Flora of the Kimberley Region: 341, Fig. 101B [secondary reference]

Cowan, R.S. (31 July 1996), Notes on miscellaneous mimosoid legumes (Leguminosae: Mimosoideae), mostly Australian. Nuytsia 11(1): 13 [secondary reference]

• Lectotype: "sub-tropical New Holland, 6 December 1846, T.L. Mitchell 442 (K-Herb. Bentham)."

Cowan, R.S. in McCarthy, P.M. (ed.) (1998), Mimosaceae. Flora of Australia 12: 24, Fig. 5 APC [secondary reference]

• APC Dist.: WA, NT, Qld, NSW

McCarthy, P.M. in McCarthy, P.M. (ed.) (1998), Appendix: Neptunia. Flora of Australia 12: 193 [secondary reference]

• Text: "The lectotype chosen by the late R.S.Cowan (Nuytsia 11: 13, 1996) and one of the 'paralectotypes' postdates the description of the species by four years, and could not have been seen by Bentham. Since ICBN (Tokyo Code), Art. 9.9 (1994) dictates that "... the lectotype msut be chosen from among the syntypes...", lectotypification has not been effected: Ed."

Bean, A.R. (16 November 2022), A revision of Neptunia Lour. (Leguminosae: subfamily Caesalpinioideae, Mimosoid clade) in Australia and Malesia. Austrobaileya 12: 73 [secondary reference]

• Text: "Cowan (1996) published a paper in which he typified many names in the Mimosaceae. For Neptunia gracilis (described by Bentham in 1841), he designated as lectotype a specimen collected by Thomas Mitchell in 1846. This specimen was obviously not available to Bentham when he was describing the species, hence it is not original material and Cowan’s attempted lectotypification is ineffective. A specimen collected from Mitchell’s second or third expedition (which took place in 1835 and 1836 respectively) is here designated as the lectotype. The label of the lectotype at K has printed on it “Interior of New Holland/ Major Mitchell’s Expedition, 183 .”. Handwritten notes have been added saying “Neptunia gracilis Benth in Hook. Journ. 4.355” and “Lindley 8 [i.e. 1838]”. This indicates that the specimen was received by Kew from John Lindley in 1838. Mitchell had sent all his botanical specimens directly to Lindley, who then described some of them as new species in Mitchell’s journal (Mitchell 1838) and distributed specimens to major herbaria. The isolectotype at P has the identical printed label, and the handwritten addition says “M[onsieur] Lindley 1838”. The isolectotypes at W have the same printed label, plus a handwritten “1839.V./ Lindley” indicating that they received the specimens from Lindley in (May?) 1839."

Bean, A.R. (16 November 2022), A revision of Neptunia Lour. (Leguminosae: subfamily Caesalpinioideae, Mimosoid clade) in Australia and Malesia. Austrobaileya 12: 72, Map 3 [secondary reference]

• Type: "[Australia. New South Wales] Interior of New Holland, s.dat. [1835 or 1836], T. Mitchell s.n. (lecto: K 000791032 [here designated]; isolecto: P 02735407, W 0028233, W 0028231)."

nomenclatural synonym: Neptunia gracilis var. typica Domin nom. inval. nomenclatural synonym: Neptunia gracilis Benth. f. gracilis legitimate taxonomic synonym: Neptunia depauperata Merr. legitimate

Percy-Bower, J.M. & Parker, C.M. (21 March 2023), Updates to Western Australia’s vascular plant census for 2022. Nuytsia 34: 14 [secondary reference]

• Etymology: "Excluded taxon. This taxon does not occur in WA. See Bean (2022) [Bean, A.R. (2022). Austrobaileya 12: 59–106.]"

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