myrtle UK /ˈmɜːtl̩/US /ˈmɝtl̩/ noun4 •An evergreen shrub or small tree of the genus Myrtus, native to southern Europe and north Africa. •A dark green shade that resembles the color of Myrtus leaves. •(Australia) A tall evergreen Australian tree, Nothofagus cunninghamii, native to Victoria and Tasmania.[W]here the gullies are fringed with blackwoods, wattle, myrtles, musks and sassafras[.] — 1951 •A small tree or tall shrub, Cyrilla racemiflora, native to temperate and tropical regions of the Americas. formsmyrtles