Nils Johan Andersson, a Swedish botanist, born Feb. 20, 1821. He made a voyage round the world in the Swedish frigate Eugenie in 1851-'3, and published Verldsomsegling (3 vols., Stockholm, 1853-'4). he also wrote on Scandinavian botany. Since 1856 he has been professor at Stockholm, and superintendent of the botanical collection of the academy of sciences.