Källersjö, M. (1988), A generic re-classification of Pentzia Thunb. (Compositae-Anthemideae) from southern Africa. Botanical Journal of the Linnean Society 96: 310 [tax. nov.]

• Type: Oncosiphon pilulifer (L.f.) Källersjö

pro parte taxonomic synonym: Matricaria L. legitimate pro parte taxonomic synonym: Pentzia Thunb. legitimate

• Etymology: "The name is derived from the Greek words 'onco-' ( = thick, swollen) and 'siphon' (=tube). It refers to the conspicuously swollen corolla tube which is characteristic of the genus."
• Comment: Although the species epithets published by Källersjö in this genus indicate neuter gender, the Greek term 'siphon' is masculine and the epithets are thus correctable under ICN Art. 23.5 (Shenzhen Code, 2018).

Jeanes, J.A. in Walsh, N.G. & Entwisle, T.J. (ed.) (1999), Asteraceae. Flora of Victoria 4: 929 [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: 355 [secondary reference]

Thompson, I.R. (22 May 2007), A taxonomic treatment of tribe Anthemideae (Asteraceae) in Australia. Muelleria 25: 44 APC [secondary reference]

• APC Dist.: WA (naturalised), SA (naturalised), NSW (naturalised), Vic (naturalised)

Mabberley, D.J. (1 May 2008), Mabberley's Plant-Book Edn. 3: 601 [secondary reference]

Thompson, I.R. in Wilson, A.J.G. (ed.) (2015), Asteraceae Subfam. Asteroideae Trib. 3. Anthemideae. Flora of Australia 37: 356 [secondary reference]

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