Sepals 3 to 5, often unequal, sometimes accrescent. Sepals 5, gamosepalous, campanulate, slightly accrescent, persistent, valvate. Fruit berry, globose, turned bluish-black or black when ripe, enclosed in the red accrescent fruiting-calyx. Sepals usually connate, often colored, usually accrescent. The calyx is actinomorphic or nearly so, and not accrescent as in some related genera.