There is wide diversity in flower structure and pattern in nature. The number and morphological variation of flower organs in Eranthis of the family Ranunculaceae is high, but the pattern of flower structure variation in this genus is unclear. In this study, the morphological and numerical variation in organs of Eranthis stellata Maxim. and Eranthis lobulata W. T. Wang were observed with stereomicroscopy and scanning electron microscopy, and the patterns of variation were summarized statistically. The results showed the following: (1) The structural patterns of the two species of Eranthis were not stable. There were 232 flower structural patterns among 300 individuals of E. stellata and 55 among 100 individuals of E. lobulata. The number of floral organs in E. lobulata was significantly less than that in E. stellata. (2) The morphological variation in flower organs in Eranthis mainly occurred in petals, especially in the upper lip, pseudonectaries and lower lip, e.g., the number of lobes, and pseudonectaries and inconsistency in the upper lip edge. (3) The coefficient of variation (CV) of flower organs was greater than 20%, with some values close to 40%, which indicates that the number of floral organs of the two species differ substantially, and that the number of floral organs was extremely unstable. The range in stamen number was the largest while that in sepal number was the smallest, and this fluctuation might be caused by the spiral phyllotaxis of floral organs.

自然界中的花的结构和花样繁多。毛an科的ran葵花器官的数量和形态变异较高，但该属的花结构变异模式尚不清楚。在这项研究中，Eranthis stellata Maxim的器官的形态和数值变化。和菟葵属lobulata WT王用立体显微镜和扫描电子显微镜观察到的，并且变化的图案进行统计学总结。结果表明：（1）两种ran虫的结构型态不稳定。300颗大肠埃希菌中有232种花型和100个球藻个体中的55个。球形大肠杆菌（E. lobulata）花器官的数量明显少于恒星大肠杆菌（E. stellata）。（2）E葵花器官的形态变化主要发生在花瓣上，特别是在上唇，假蜜腺和下唇，例如，裂片的数量，假蜜腺和上唇边缘的不一致。（3）花器官的变异系数（CV）大于20％，有些值接近40％，这表明两个物种的花器官数目存在显着差异，并且花器官数目为极不稳定。雄蕊数量范围最大，而萼片数量范围最小，这种波动可能是由花器官的螺旋叶轴引起的。