Luís Wittnich Carrisso (14 February 1886 – 14 June 1937) was a Portuguese botanist, professor at the University of Coimbra.

[1] Carrisso took interest in evolution and heredity and presented his PhD thesis Hereditariedade in 1911.

[1] In 1918, he became Professor of Botany at University of Coimbra's Botanical Garden.

[1] He was a supporter of Charles Darwin's theory of evolution but was skeptical of the role of natural selection.

[1] He died on 6 June 1937 in the Namib desert (Moçâmedes), in Angola, of cardiac syncope, during his third botanical expedition to that country.