Fleshy fruits have evolved independently several times amongst Myrtaceae. Using a family-wide phylogeny, Biffin et al. (pp. 79–93) find that the parallel evolution of fleshy fruit was accompanied by a positive shift in diversification rates for the tribes Syzygieae and Myrteae, and that fleshy fruits may thus represent a ‘key innovation’ for evolution of rainforest Myrtaceae.
E. Biffin, E. J. Lucas, L. A. Craven, I. Ribeiro da Costa, M. G. Harrington, M. D. Crisp, 2010, 'Evolution of exceptional species richness among lineages of fleshy-fruited Myrtaceae', Annals of Botany, vol. 106, no. 1, pp. 79-93 http://dx.doi.org/10.1093/aob/mcq088