Objective: To analyze the chemical components of the essential oil extracted from two cultivars of Chrysanthemum morifolium (C. morifolium Ramat "Hongxinju" cv. nov. and C. morifolium Ramat "Huangju" cv nov.) cultivated in Jangsu province and provide scientific basis for their quality control. Method: The essential oil of the two cultivars of C. morifolium were extracted by water steam distillation and separated by GC capillary column chromatography. The components were quantitatively determined with normalization method

and identified by GC-MS. Result: From the C. morifolium Ramat "Hongxinju" cv. nov. and C. morifolium Ramat "Huangju" cv nov.

217 and 167chromatographic peaks were detected

among them 73 and 64 components were identified

which were composed of 67.36% and 62.75% of the total essential oil

respectively. Conclusion: 2-carene

cis-ocimene

gamma.-terpinene

camphor

borneoll

trans (. beta.)-caryophyllene

zingiberene

farnesene

caryophyllene oxide and junipercamphor were identified in the essential oil of the two cultivars C. morifolium Ramat "Hongxinju" cv. nov. and C. morifolium Ramat "Huangju" cv nov.. Among them

the amounts of junipercamphor were the most which were composed of 12.64% and 10.87% of the total essential oil

respectively. Trans (. beta.)-caryophyllene is the second

which were composed of 6.45%and 4.38% of the total essential oil

respectively. There are marked differences in the compounds between the two samples. The results provide scientific basis for quality control of Chrysanthemum morifolium which are cultivated in Jangsu province.