The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.
- Enumeratio Stirpium Pleraumque, quae sponte crescung in agro Vindobonensi 55, 230, pl. 3. 1762. (Enum. Stirp. Vindob.)
- Lorence, D. H. 1999. A nomenclator of Mexican and Central American Rubiaceae. Monogr. Syst. Bot. Missouri Bot. Gard. 73: 1–177.
- Nasir, E. & S. I. Ali (eds). 1980-2005. Fl. Pakistan Univ. of Karachi, Karachi.
- Species Plantarum 1: 331. 1753. (1 May 1753) (Sp. Pl.)
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