Linnaeus, C. (1 May 1753), Species Plantarum 2: 923 [tax. nov.]

• Type: (not designated).

Linnaeus, C. (1754), Genera Plantarum Edn. 5: 395 [secondary reference]

Black, J.M. (1929), Bignoniaceae - Compositae. Flora of South Australia 4: 614 [secondary reference]

• Etymology: "From Greek osteon, bone; sperma, seed: alluding to the hard fruit."

Green, M.L. in Ramsbottom, J., Wilmott, A.J., Wakefield, E.M. & Sprague, T.A. (ed.) (August 1929), The application of Linnean generic names to be determined by means of specified Standard-species. Nomenclature: Proposals by British Botanists: 184 [secondary reference]

• Type: "Osteospermum moniliferum L., the best known of the original species."

common name: bush tick berry [n/a]

• Text: "Common in South Africa..."

Norlindh, N.T. (1943), Studies in the Calenduleae: 98-366 [secondary reference]

• Type: Osteospermum spinosum L

taxonomic synonym: Tripteris Less. nom. cons.

Black, J.M. & Robertson, E.L. (1957), Flora of South Australia Edn. 2, 4: 889 [secondary reference]

• Etymology: "From Greek osteon, bone; sperma, seed: alluding to the hard fruit."

Beadle, N.C.W., Evans, O.D. & Carolin, R.C. (1962), Handbook of the Vascular Plants of the Sydney District and Blue Mountains: 387 [secondary reference]

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 83 [secondary reference]

Jessop, J.P. in Jessop, J.P. (ed.) (1981), Compositae (Asteraceae) - most genera. Flora of Central Australia: 385-386 [secondary reference]

Lander, N.S. in Marchant, N.G., Wheeler, J.R., Rye, B.L., Bennett, E.M., Lander, N.S. & Macfarlane, T.D. (1987), Asteraceae. Flora of the Perth Region 2: 695 [secondary reference]

Brummitt, R.K. (1992), Vascular Plant Families and Genera: 439 [secondary reference]

taxonomic synonym: Tripteris Less. nom. cons.

Scott, J.A. & Hardin, D.W. in Harden, G.J. (ed.) (1992), Osteospermum. Flora of New South Wales 3: 315-316 [secondary reference]

Jarvis, C.E. (August 1992), Seventy-two proposals for the conservation of types of selected Linnaean generic names, the report of Subcommittee 3C on the lectotypification of Linnaean generic names. Taxon 41(3): 567 [secondary reference]

Short, P.S. in Walsh, N.G. & Entwisle, T.J. (ed.) (1999), Osteospermum. Flora of Victoria 4: 831 [secondary reference]

Barrie, F.R. (August 2006), Report of the General Committee: 9. Taxon 55(3): 796 [secondary reference]

Anderberg, A.A., Baldwin, B.G., Bayer, R.G., Breitwieser, I., Jeffrey, C., Dillon, M.O., Eldenäs, P., Funk, V., Garcia-Jacas, N., Hind, D.J.N., Karis, P.O., Lack, H.W., Nesom, G., Nordenstam, B., Oberprieler, C., Panero, J.J., Puttock, C., Robinson, H., Stuessy, T.F., Susanna, A., Urtubey, E., Vogt, R., Ward, J. & Watson, L.E. in Kubitzki, K. (ed.) (2007), Compositae. The Families and Genera of Vascular Plants 8: 244, Fig. 59 [secondary reference]

Mabberley, D.J. (1 May 2008), Mabberley's Plant-Book Edn. 3: 614 [secondary reference]

Council of Heads of Australasian Herbaria (2011), Australian Plant Census: - APC [secondary reference]

• APC Dist.: NT (doubtfully naturalised)

Council of Heads of Australasian Herbaria (2011), Australian Plant Census: - [pro parte taxonomic synonym]

pro parte taxonomic synonym of: Oligocarpus Less. legitimate

Council of Heads of Australasian Herbaria (2011), Australian Plant Census: - [pro parte taxonomic synonym]

pro parte taxonomic synonym of: Monoculus B.Nord. legitimate

Manning, J.C. & Goldblatt, P. (2012), Plants of the greater Cape floristic region: 1: The Core Cape Flora. Strelitzia 29: 802 [secondary reference]

taxonomic synonym: Calendula L. legitimate taxonomic synonym: Chrysanthemoides Fabr. legitimate taxonomic synonym: Tripteris Less. nom. cons. taxonomic synonym: Oligocarpus Less. legitimate taxonomic synonym: Monoculus B.Nord. legitimate

Ghafoor, A. in Wilson, A.J.G. (ed.) (2015), Asteraceae Subfam. Asteroideae Trib. 2. Calenduleae. Flora of Australia 37: 325-326 [secondary reference]

• Etymology: "from the Greek osteon (bone) and sperma (seed), an allusion to the hard achenes of some species."

Council of Heads of Australasian Herbaria (31 July 2018), Australian Plant Census: - [pro parte taxonomic synonym]

pro parte taxonomic synonym of: Monoculus B.Nord. legitimate

---