Geographic Distribution
Welwitschia mirabilis is endemic to the Kaokoveld Centre; the population is distributed southwards from the Nicolau River in southern Angola, to the Kuiseb River in Namibia and up to 100 km inland of the coast. The area is extremely arid: the coast is recorded as having almost zero rainfall, while less than 100mm of rain falls annually below the escarpment in the wet season from February to April. Populations tend to occur in ephemeral water courses, indicating a dependence on ground water in addition to precipitation from fog.
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