Ebcnus armitagei Schweiuf. et Taub(Leguminosae) is a perennial woody species endemic to the western Mediterranean coast of Egypt and Libya The species is uery rare and restricted to a narrow range of distribution. Growth, phenology, seed output, and predation by the bruchid beetle Callosobruchus maculatus F. (Bruchidae—Coleoptera) of a naturally growing population were monitored. Growth and phenology are highly seasonal and correlated with precipitation and temperature. Up to 48.4% of the population is in the juvenile stages, which experience high mortality. Seed predation is extraordinarily heauy. An auerage of 94.4% of seeds in different stages of maturity are consumed or damaged by C. maculatus. Habitat change and biotic factors within populations including seed predation are threatening the species’existence in the wild.