Forster, P.I. & Halford, D.A. in Bostock, P.D. & Holland, A.E. (ed.) (2007), Rubiaceae. Census of the Queensland Flora 2007: 179 [primary reference]

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 [secondary reference]

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

taxonomic synonym of: Spermacoce sp. Coen (R.K.Harwood 1478) Qld Herbarium [n/a]

---