Auguste Adolphe Lucien Trécul (8 January 1818 in Mondoubleau – 17 October 1896 in Paris) was a French botanist. He studied pharmacy in Paris, and in 1841 became an interne to hospitals. His interests later changed to botany, and in 1848–50, on behalf of the Muséum national d'histoire naturelle and the Ministry of Agriculture, he conducted scientific research in North America. In 1866 he became a member of the Academy of Sciences (botany section), and during the following year, was awarded the Légion d'Honneur.