The sepals are united (gamosepalous). Calyx are gamosepalous, valvate, sepaloid. They may be free (polysepalous) or fused together (gamosepalous). Sepals 5, gamosepalous, campanulate, slightly accrescent, persistent, valvate. Fertile flowers have a gamosepalous calyx beneath their corolla and display five distinctive lobes. The gamosepalous green sepals consist of ovate lobes, and are distributed in one whorl. Its calyx is gamosepalous, like a little red thimble. Sepals 5, gamosepalous, tube short, 5 lobed, obtuse, glabrous, imbricate, odd sepal is anterior.