Markgraf, F. (1927), Apocynaceae. Nova Guinea 14: 278 [tax. nov.]

• Type: Papua New Guinea. Okaba, 13.ix.1907, Branderhorst 64 (holo: U!).

Forster, P.I. (1990), The status of Carissa laxiflora Benth. and Carissa papuana Markgraf (Apocynaceae). Blumea 35(1): 263 [taxonomic synonym]

taxonomic synonym of: Carissa laxiflora Benth. legitimate

Forster, P.I. (19 October 1992), A taxonomic revision of Carissa (Apocynaceae) in Australia. Australian Systematic Botany 5(5): 588 [taxonomic synonym]

taxonomic synonym of: Carissa laxiflora Benth. legitimate

Leeuwenberg, A.J.M. & Dilst, F.J.H. van (2001), Series of revisions of Apocynaceae XLIX. Carissa L. Wageningen University Papers 2001-01: 46 [taxonomic synonym]

taxonomic synonym of: Carissa spinarum L. legitimate

Council of Heads of Australasian Herbaria (7 July 2021), Australian Plant Census: - [taxonomic synonym]

taxonomic synonym of: Carissa laxiflora Benth. legitimate

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