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对南瓜的两性花进行外部形态及结构的研究，结果表明：南瓜的两性花可有子房上位花、子房半下位花和子房下位花三种类型：花萼、花冠均为５，合瓣；雄蕊３，其中有两枚各由两个雄蕊合生而成，分离和部分联合，花药结构特殊，花粉发育正常；雌蕊具有单个或两个柱头及花柱。子房壁结构正常。上方的子房壁表皮发育完好，具气孔器。胚珠在外形上也发育正常。两性花与单性花同生长在一个植株上，可以连续多代稳定地遗传，萌生当代植株的种子来源于上一代雌花。这对探讨被子植物的系统进化关系有着重要的意义
The results showed that the bisexual flowers of pumpkin could have three types of upper ovary, submucous ovary and the next ovary of the ovary: the calyx and corolla were all 5, Stamens 3, of which two are each composed of two stamens connate, separated and partially united, the anther structure is special, pollen development is normal; pistil has a single or two stigma and style. Ovary wall structure is normal. Ovary wall epidermis above the well-developed, with stomatal apparatus. Ovules are also normal in appearance. Bisexual and unisexual flowers grow on the same plant, which can be inherited steadily for many generations. The seed of the initiation plant is derived from the previous generation of female flowers. This is of great significance to the systematic evolutionary relationship between angiosperms