Candolle, A.L.P.P. de (1838), Bibliotheque Universelle de Geneve, ser. 2 17: 130-131 [tax. nov.]

Cronquist, A.J. (1981), An Integrated System of Classification of Flowering Plants: 970 [secondary reference]

Fischer, E., Theisen, I. & Lohmann, L.G. in Kubitzki, K. (ed.) (2004), Bignoniaceae. The Families and Genera of Vascular Plants 7: 22 [secondary reference]

Mabberley, D.J. (1 May 2008), Mabberley's Plant-Book Edn. 3: 837 [secondary reference]

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