Abstract: The essential oil from the fresh flowers extract of Rosa cymosa Tratt. was prepared by steam distillation. The plants was collected from the Long Dong Bao near Guiyang of Guizhou province. There are 28 components inden-tified by GC/MS in the essential oil on Finnigan-4510 instrument. The major components are eugunol (41.64%), linalool (9.26%),nonadecane (6.73%), hepta-decane (4.81%), geraniol (4.53%), benzyl methanol ( 3.55 % ), 1-heptadeccne (3.91%), cinnamic aldehyde (3.43%) , ethyl benzoate (2.88% ) , trans-linalool oxide (0.98%). The essential oil has a fragrant aroma, and the effect of raising and stabilizing the aroma of the essence used in cosmetics and so on, as well the effect of sterilization and antisepsis in foods and medicine. This scientific research will provide scientific basis for the exploitation and application of the plants resou-rce of Rosa cymosa.

Key words: Essential oil

摘要： 小果蔷薇（Rosa cymosa Tratt.)是蔷薇属植物。分布在我国江西、江苏、浙江、安徽、河南、四川、云南、贵州、福建、广东、广西、台湾等省。生于海拔250一1300米的向阳山坡，河谷，路旁，灌丛〔1〕。资源较丰富，但目前尚未开发利用。该油具有清香、花香和玫瑰的甜香。用于调配化妆品、烟用等香精，具有增香和定香的作用。用于食品、医药中，具有防腐、抗菌等作用[2]。该研究为小果蔷薇芳香油的开发利用提供科学依据。

关键词: 精油, GC－MS, 丁香酚, 小果蔷薇