Brito, L. D. A., Dias, P., & Pirani, J. R. (2019).

Synonymization of the monotypic genus Nycticalanthus in Spiranthera (Rutaceae: Galipeinae)

. Phytotaxa, 422(1), 106–108. https://doi.org/10.11646/phytotaxa.422.1.8