He is remembered for his work involving the flora of Algeria and Tunisia. Trabut was a professor of natural history at the Faculty of Medicine and Pharmacy of Algiers, and also a consultant physician to the Mustapha Pacha hospital. With botanist Jules Aimé Battandier (1848–1922), he published several works on Algerian flora, that included the following:
Flore de l"Algérie (Flora of Algeria) (1888-1890).
L"Algérie, le sol et les habitants, flore, faune, geologie, anthropologie, ressources agricoles et économiques (Algeria, the land and its people, Flora, fauna, geology, anthropology, agricultural resources and economics) (1898).
Flore analytique et synoptique de l"Algérie et de la Tunisie (Flora analytic and synoptic of Algeria and Tunisia) (1905). He has several plant species named after him, such as the eucalyptus species Eucalyptus trabutii.