Caffeine content distribution among Mascarocoffea species in Madagascar.

The wild coffee species of Madagascar and neighbouring islands in the Mascarocoffea section has been believed to be caffeine free during almost a century with the exception of Coffea mauritiana which present a very low content (0.07%) (Bertrand, 1905; Rossi, 1933; Chevalier, 1938; Chassevent et al., 1974). Unequivocal evidence for the presence of caffeine was published for the first time by Clifford et al. in 1991.