(4). Proposal for the Conservation of the Generic Name 7732 Tabebuia Gomes ex DC. (Bignoniaceae) in Bibl. Univ. Geneve, n.s., 17: 130 (Sept. 1838) versus Leucoxylon Raf., Sylva Tellur. 77 (1838), and Potamoxylon Raf., l.c. 78, and Proterpia Raf., l.c. 80