A new species of Mosiera (Myrtaceae) from the Sierra de Nipe, Cuba

A new species, Mosiera nipensis (Myrtaceae), from the crest of the Sierra de Nipe, Cuba, is described and illustrated. This species is readily distinguished from all other species of Mosiera by two diagnostic characters: four-angled, slightly four-winged young twigs, and calyx lobes that are valvate in the bud. We suspect that this species grows on a serpentine substrate. It is known only from the holotype, a collection made in 1941. An assessment of its conservation status is urgently needed.