When thinking about rich biodiversity, the rainforest would come to mind for most people, but when it comes to plants it's actually a small nature reserve in southern South Africa.  With an area of just 7 square miles (18 square km), the park is sizable, but no bigger than other nature reserves. Still it contains over 1800 species, 14% of all plants in South Africa, more than the entirety of the UK, and most other countries.  When walking there this high density makes it so that you can find a...