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对大叶系欧李树的花芽分化进行了三年取样，制作石蜡切片。观察了花芽分化各期主要特征，发现欧李花芽分化进程快。一朵花从开始分化到雌蕊原始体出现，只需一个月时间。若是，从总的结果枝上的花芽分化看延续时间长，即使一个节位的不同花芽分化时期也不同，其分化时间从６月２８日开始到翌年３月２８日，共９个月。在一个芽内能观察到数个分化时期不同的花芽原始体，其分化进程位于上面的早于侧面的。花芽内侧有一个叶芽，花芽分化早于叶芽；确认欧李的花芽不是单生，而是簇状聚散花序；欧李的花芽是混合芽。
Large-leaved plum tree flower bud differentiation for three years sampling, making paraffin sections. Observed the main features of flower bud differentiation, found that the process of European plum flower bud differentiation fast. A flower from the beginning of differentiation to appear pistil primordium, just a month’s time. If so, from the total results of flower bud differentiation to see the extension of a long time, even if a node of different flower bud differentiation is also different, the differentiation time from June 28 to March 28 the following year for a total of 9 months. In a bud can be observed in several different stages of differentiation flower buds of the original body, the differentiation process is located above the earlier side. Flower bud inside a leaf bud, flower bud differentiation earlier than leaf buds; to confirm the plum flower bud is not a single, but clusters of scattered inflorescences; European plum flower bud is mixed.