Jean Massart (7 March 1865 in Etterbeek – 16 August 1925) was a Belgian botanist.
In 1894 he earned his PhD from the University of Brussels, where later in his career he worked as a professor.
In this role he developed new planting designs that were based on ethology and phylogeny.
[1] In 1894/95 he collected botanical specimens in Java and Sumatra, and in 1922/23, he was in charge of an expedition to Brazil.
[1][2] Today, the Jardin botanique Jean Massart at Brussels commemorates his name.