Literature

• Mori, S.A. & Gracie, C.A. 2007. Flowering Plants. Plants and Lichens of Saba Virtual Herbarium of The New York Botanical Garden. [link]
• The Plant List 2013. The Plant List version 1.1. [link]
• World Flora online. [link]

Literature references linked to higher taxa

• Encyclopedia of Life. [link] (Bignoniaceae)