中文摘要：

观测了山地五月茶Antidesma montanum的开花物候、开花动态、访花者种类和访花行为，并对其繁育系统、花粉组织化学、花粉胚珠比（P／O）、花粉活力进行了检测。结果表明：山地五月茶是雌雄异株植物；其总状花序花期可长达7天；雄花／雌花花序数目为140．33±27．79／208．33±33．65（n=6），雌雄花的颜色为很淡的黄绿色小型花；雄花单花花期为2天，花药开裂当天有活力，花粉为非淀粉型，花粉胚珠比为3333．33±607．18；单花花蜜量可达0．34±0．03μL，花蜜含糖量3．69％±0．30％。花的结构和开花式样适合蝇类传粉。芳香的气味是吸引蝇类的直接物质：花蜜是传粉者的报酬。主要的传粉昆虫为双翅目Diptera丽蝇科Calliphoridae的Chrysomya megacephala、Chrysomyasp．、寄蝇科Tachinidae的Drino sp．和蝇科Muscidae的Spilogona sp．、Mitroplatia sp．。套网不授粉的处理不结实，表明山地五月茶不存在无融合生殖，人工辅助授粉的坐果率（39．1％）略高于自然坐果率（36．7％），二者无显著差异，表明其坐果率主要受自身资源分配限制。还讨论了蝇类传粉与雌雄异株性系统以及蝇类传粉与热带林中小型黄绿色花植物的相关性。

英文摘要：

The floral and pollination biology ofAntidesma montanum was studied. The floral phenology, pollen-ovule ratio （P/O）, pollen histochemistry, pollen viability, floral visitors and their behavior, and the sexual system were observed and determined. The observation is that Antidesma montanum is a dioecious species with a sexual ratio of ca. 1：1 during anthesis. Results were obtained as follows： （1） A male/female inflorescence consisted of 140.33±27.79/208.33±33.65 （n=6） small （diameter ca. 3.4 mm） light greenish yellow flowers; both male and female inflorescences lasted for ca. 7 days. （2） The longevity of a single flower ofA. montanum was 2 days; pollen viability （MTT test） remained at a high level （〉95%） after anthesis; the pollen was starchless; uncalibrated pollen/ovule ratio was 3333.33±607.18; a mesh-netted flower produced up to 0.34±0.03μL nectar with 3.69%±0.30% sugar equivalent. （3） The floral design and floral display were well adapted to fly pollination. （4） The effective pollinators were dipteran insects Chrysomya megacephala （Calliphoridae）, Chrysomya sp., Drino sp. （Tachinidae）, Spilogona sp. （Muscidae）, and Mitroplatia sp. （Muscidae）, which visited both male and female flowers for nectar. The sweet scent emitted during anthesis was a direct attraction to pollinators. No fi＇uit set in bagged flowers indicated that there was no apomixis. No significant difference was found in fruit sets between flowers with open pollination （36.7%） and hand supplemental pollination （39.1%）, suggesting that the fi＇uit set was determined by its resource limitation. The correlations between fly pollination and the diclinous sexual systems, and between fly pollination and plants with small greenish yellow flowers were also discussed.