%0 Article
%T Lectio praecursoria (the opening presentation) of J. P. Norrlin at his public defence of a doctoral thesis on may 13th 1871
%A Norrlin, J. P.
%D 1923
%J Acta Forestalia Fennica
%V 23
%N 2
%R doi:10.14214/aff.7101
%U https://silvafennica.fi/article/7101
%X <p>The text is the opening presentation by the author at his public defence of his doctoral thesis on plant geography of Finland. The text discusses the principles that apply on plant geographical classification of earth with respect to characteristics of vegetation and gives an oversight on the plant geographical work conducted in Scandinavia. </p>