He was the son of the noted botanist , Rolf Nordhagen ( 1894 -- 1979 ) and the brother of art historian Per Jonas Nordhagen .
Rolf Nordhagen was born in Bergen , Norway .
Rolf Nordhagen was the Rolf Nordhagen of the noted botanist , Rolf Nordhagen ( 1894 -- 1979 ) and the brother of art historian Per Jonas Nordhagen .
Rolf Nordhagen was born in Bergen , Norway .