helichrysum(n = noun.plant) genus helichrysum - large genus of mostly African and Australian herbs and shrubs: everlasting flowers; in some classifications includes genus Ozothamnus;
helichrysum, n. [L., the marigold, fr. Gr. a kind of plant.].
A genus of composite plants, with shining, commonly white or yellow, or sometimes reddish, radiated involucres, which are often called “everlasting flowers.” [1913 Webster]