【摘要】 丝瓜、葫芦、据楼三种植物的雌、雄花蜜腺在形态、位置、结构和泌密方式上有很大的区别。其雄花蜜腺都位于花托上，由花托表面的细胞发育而来。雌花蜜腺位于子房与花冠之间，由两者间的细胞发育而来。雌、雄花蜜腺均为淀粉型蜜腺，其中三种植物的雄花蜜腺分泌表皮上气孔器丰富、淀粉粒多，蜜汁主要以渗透方式泌至分泌表应经变态气孔泌出而三种植物的雌花蜜腺缺乏气孔器，淀粉粒相对少，其原变汁主要以渗透和胞吐相结合的方式泌至分泌表皮，经薄的角质层处泌出。更多还原

【Abstract】 The morphology, structure, occurance and ontogeny of floral nectaries of threespecies of nectariferous plants Cucurbitaceae and the changes of nectaries cells beforeand after the exudation were studies. The difference of female and male floral nectariesand the way of nectar,s exudation were also discussed. The male floral nectaries hadplenty of stomas in their epidermis,the female floral nectaries had few stomas. All of thefloral nectaries were structure nectaries,they were generated by the meristem cellslocated at the surface of floral organs,none of them had special initial cells.更多还原