Xerospermum Blume, Rumphia 3 (1847) 99; Radlk. in Engl., Pflanzenr. 98 (1932) 936-950. – Xerospermum sect. Tetrasepalum Radlk. (in Th. Dur., Index Gen. Phan. (1887) 76, nom. nud.) in Engl. & Prantl, Nat. Pflanzenfam. 3, 5 (1895) 331, nom. illeg. (I.C.B.N. ed. 1978, art. 22.1). – Type: X. noronhianum Blume. Xerospermum sect. Pentasepalum Radlk. [in Th. Dur., Index Gen. Phan. (1887) 76, nom. nud.] in Engl. & Prantl, Nat. Pflanzenfam. 3, 5 (1895) 331. — Syntypes: X. acuminatum Radlk., X. laevigatum Radlk.