A distribution map of the plant Notobubon galbanum, otherwise known as the Blister Bush in the Western Cape, South Africa.
Roughly based on a distribution map in "A Taxonomic Revision of the Woody South African Genus Notobubon (Apiaceae: Apioideae)"

Source: http://www.bioone.org/doi/abs/10.1600/036364409787602294
Own work
Discott