Axel Gudbrand Blytt (1843–1898), Norwegian botanist and geologist (standard botanist abbreviation: A.Blytt) (son of Matthias Numsen Blytt)
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Matthias Numsen Blytt (1789–1862), Norwegian botanist (standard botanist abbreviation: Blytt) (father of Axel Gudbrand Blytt)
Matthias Numsen Blytt (26 April 1789 – 26 June 1862) was a Norwegian botanist.