Abstract: The chemical constituents of the hydrocarbon fraction of essential oils of Caryopteris tangutica Maxim. and C. glutinosa Rehd were examined by means of GC-MS-COM and GC retention time data on a 45 m capillary column coated with OV- 101. 21 components have been saparated and identified, i.e. α-thujene, α-pinene, cam- phene, sabinene, β-pinene, β-myrcene, α-terpinene, p-cymene, limonene, β-ocimene-y, β- phellandrene, α-terpinolene, α-cubebene, α-copaene, α-cedrene, β-caryophyllene, γ-cadinene, 1-aromadendrene, α-humulene, β-bisabolene and δ-cadinene. The quantitative determination of these components was carried out by GLC also.

Key words: Caryopteris tangutica, C. glutinosa, monoterpene and seequiterpene, hydrocarbon fraetion