A member of the prayer plant family, the triostar folds its leaves up at night, and it can often be confused with the similar calathea plant. Although flowers can develop on this plant in spring when kept outdoors, it's the large, colorful leaves that are its star attraction indoors and out. It's a moderately fast-growing plant but will become temperamental and slow down when it feels disturbed, root bound, or doesn't get enough light.