Nomenclatural notes on species of Apocynaceae described from Cambodia, Laos and Vietnam

There have been many citation and typification errors in the Apocynaceae s.str. (Apocynaceae, subfamilies Rauvolfioideae and Apocynoideae) from Cambodia, Laos and Vietnam. Therefore, all species and infraspecific taxa published from this region before 1950 are listed with their correct places of publication and details of their typifications. Fifty-one taxa are lectotypified here of which 23 are second step lectotypifications.