Merrill, E.D. & Perry, L.M. (1945), Journal of the Arnold Arboretum 26: 4 [tax. nov.]

• Type: "BRITISH NEW GUINEA: Wuroi, Oriomo River, Brass 5831, Jan. 1934, alt. 10 m., small savanna clearing (plant with pale purple flowers)."

Thomas, M.B. & McDonald, W.J.F. (1987), Rare and threatened plants of Queensland: a checklist of geographically restricted, poorly collected and/or threatened vascular plant species Edn. 1: 45 [secondary reference]

Thomas, M.B. & McDonald, W.J.F. (1989), Rare and threatened plants of Queensland: a checklist of geographically restricted, poorly collected and/or threatened vascular plant species Edn. 2: 48 [secondary reference]

Halford, D.A. (9 September 1992), Review of the genus Oldenlandia L. (Rubiaceae) and related genera in Australia. Austrobaileya 3(4): 717, Map 13 [secondary reference]

Hyland, B.P.M., Gray, B. & Elick, R.W. in Cooper, W.E. & Cooper, W.T. (1994), Appendix I: Provisional Species List. Fruits of the Rainforest: 311 [secondary reference]

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

• APC Dist.: Qld

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