Wonderful pictures, I live in South Africa and I must say that I'm proud of the scenic beauty of my country. I am a director of a company that specializes in the development of holiday cottages, and we own a number of fantastic places in SA. I get to see the Big- 5 about twice a week, and sometimes get within a few feet from them. I have a few nice photographs as well, and off course I know places that the average tourist or traveller never get to see. The tree you wanted to know about is called a "Naboom" which means "Almost a tree" in Afrikaans. It is actually a succulent.
Greetings