Petals 5, differing slightly in size, imbricate, sometimes unguiculate, free, keel without apical appendages.

5，在尺寸方面的不同稍，覆瓦状，有时具爪，，有顶端属物的。

Petals free, alternating with 5 extrastaminal nectary glands, yellow to reddish yellow, rarely white, often denticulate at apex.

，与5个雄蕊外产蜜腺的腺体互，黄色或红黄色，很少白色，通常在先端具细齿。