Plicate carpel 6 ~8, initiated in a whorl simultaneously.

心皮6～8枚, 呈一轮同时发生,为对折型心皮.

Calyx campanulate or cup-shaped, 5-lobed, often 10-ribbed basally and plicate in bud.

花萼钟状或杯状的，5浅裂，通常10肋基生的和折扇状在芽中。