Does phenology distinguish bitter and sweet African bush mango trees (Irvingia spp., Irvingiaceae)?

Key message This phenological analysis of bitter and sweet bush mango trees is part of their biosystematics. It supports the species distinction hypothesis postulated by Harris (Bull J Bot Nat Belg 65(1–2):143–196, 1996 ) and Lowe et al. (Mol Ecol 9:831–841, 2000 ).