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