The mature stomatal morphology of 11 southern African speciesof Eugenia, and also ofE. unifloraL. (naturalized) andE. incertaDiimmer (a garden plant of unknown origin) has been studied by light and scanning electron microscopy.Leaves of all the species are hypostomatic and water‐stomata are occasionally present. Two different stomatal types, X and Y, differing mainly in their cuticular ornamentation, were found in the southern African species. The grouping of species based on stomatal characters supports a previous grouping of species on the basis of periderm and seed characters.Conspicuous lipid bodies, usually present in the subsidiary cells, are limited to the southern African species. Although the subsidiary cells do not differ in shape and size from adjacent epidermal cells, their contents often have a higher tannin content than ordinary epidermal cells. The variable patterns of arrangement of the three to five subsidiary cells makes it difficult to identify the stomata with existing classifications based on mature topography. Thus, a new term ‘anomostaurocytic’ is proposed for the stomatal type found in the southern African species.Stomata ofE. unifloraandE. incertaare paracytic and anomocytic respectively, and the cuticular ornamentation of their stomata differs from those of the southern African species. The view thatE. incertais not closely related to the southern African species is supported by differences in its cuticular ornamentation, lack of lipid bodies in the subsidiary cells, anomocytic stomata and prominent T‐pieces at the guard cel