Literature

• Proosdij, A.S.J. van 2012. Arnoldo's Zakflora: Wat in het wild groeit en bloeit op Aruba, Bonaire en Curaçao. 318 pp. Walburg Pers, Zutphen.
• Debrot, A.O., Freitas, J.A. de 1999. Avifaunal and botanical survey of the Jan Thiel Lagoon Conservation Area, Curaçao. 28. Carmabi Foundation.
• The Plant List 2013. The Plant List version 1.1. [link]
• WCSP 2017. World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. [link]

Literature references linked to higher taxa

• Encyclopedia of Life. [link] (Scrophulariaceae)