Nomenclatural notes on species of Apocynaceae described from Cambodia, Laos and Vietnam Author Middleton, David J. Author Regalado J, Jacinto C. text Adansonia 2005 3 27 2 291 308 journal article http://doi.org/10.5281/zenodo.5186636 1639-4798 5186636 Bousigonia mekongensis Pierre Bull. Mens. Soc. Linn. Paris sér. 2, 1: 36 (1898) . LECTOTYPE . — Pierre 5240 ( P ), Vietnam , Bèn Tre , Mekong River, designated here.