The plant family Apocynaceae was named and described by Antoine Laurent de Jussieu in Genera Plantarum in 1789.
All the plants I have grown or that are wildflowers on the farm that were members of the plant family Asclepiadoideae (the Milkweed Family) are now members of the Apocynaceae Family. The APG II system changed that and says it should be classed as a subfamily of Apocynaceae. It is strange that the Huernia schneideriana and Asclepias species are in the same family. Of course, there are many genera of succulents, perennials, and trees (ETC.) in this HUGE family…
As of when I last updated this page on 5-3-21, Plants of the World Online lists 356 genera in the plant family Apocynaceae.
You can click on the plant names in the caption under the photos to go to the plant’s page.