A. Quintanar, D. J. Harris, D. Nguema, and P. Barberá, “Notes on cauliflory, sexual dimorphism and biogeography in Drypetes (Putranjivaceae, Malpighiales) and a taxonomic treatment for D. gabonensis and two new cauliflorous threatened species from Central Africa, D. aphanes sp. nov. and D. cauta sp. nov.”, EJT, vol. 888, no. 1, pp. 175-202, Aug. 2023.