Irma Andersson-Kottö (1 January 1895[1] – 7 July 1985) was a Swedish botanist and a pioneer in fern genetics.

In 1919 she wrote to William Bateson and joined the then John Innes Horticultural Institution (now the John Innes Centre)[3] as a volunteer worker, where later she was appointed as a student.

[2] Her study of apospory and polyploid series in Asplenium scolopendrium was important in understanding the origin and development of the alternation of generations, a key concept in plant development.

After her time in the UK studying British ferns, she returned to Sweden to work at Wenner-Gren Institute, Stockholm.

[10] More recently some of her hypothesis on the dominance of certain alleles[11] in ferns were confirmed experimentally.