Forster, P.I. & Halford, D.A. in Bostock, P.D. & Holland, A.E. (ed.) (8 December 2010), Rubiaceae. Census of the Queensland Flora 2010: 174 [primary reference]

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

taxonomic synonym of: Spermacoce sp. Natal Downs (R.J.Fensham 2259) Qld Herbarium [n/a]

Forster, P.I. & Halford, D.A. in Bostock, P.D. & Holland, A.E. (ed.) (23 July 2013), Rubiaceae. Census of the Queensland Flora: - [secondary reference]

Forster, P.I. & Halford, D.A. in Bostock, P.D. & Holland, A.E. (ed.) (August 2016), Rubiaceae. Census of the Queensland Flora: - [secondary reference]

---