Because they have large, colorful bracts and flowers, and sometimes even colorful leaves, several species are cultivated as ornamental plants throughout the tropics and in botanical gardens of temperate areas. Examples for species well known from cultivation are S. nobilis, S. parvibracteata and S. speciosa. In some areas, ornamental species have become problematic as invasive weeds. On the other hand, S. lampra from Ecuador is almost extinct.