Juniperus scopulorum

Cananga odorata (Annonaceae), Juniperus scopulorum (Cupressaceae), Myristica fragrans (Myristicaceae),... 

Oil samples from Juniperus scopulorum trees taken at different times of the day differed significantly in composition. Oxygenated terpenes and sesquiterpenes tended to increase during the day, whereas sabinene (22) decreased until late evening and increased during early morning. Diurnal variation was much less in winter than in summer (Adams, 1979 Adams and Hagerman, 1976, 1977). 

Adams, R. P., Diurnal variation in the terpenoids of Juniperus scopulorum (Cupressaceae)—Summer Versus Winter, Am. J. Bot., 66, 986-988 (1979). 

Adams, R. P. and A. Hagerman, A comparison of the volatile oils of mature versus young leaves of Juniperus scopulorum. Chemosystematic significance, Biochem. Syst. Ecol., 4, 75-79... 

Constit. of the epicuticular wax of Juniperus scopulorum (Cupressaceae). Cryst. (EtOH). Mp 112-114°. 

Mule deer, Odocoikus hmionus hemionus, prefer juniper (Juniperus spp.) that contains lower amounts of volatile oils (i.e. oxygenated monoterpenes). Of three species tested, alligator juniper (J. deppeana) had the lowest level of volatile oils and was preferred, while Utah juniper (j. osteosperma) and Rocky Mountain juniper (J. scopulorum) ranked higher in volatile oil content and lower in preference by deer (Schwartz etal, 1980). 

There are several cedarwood oils with different physical and chemical properties. They are often referred to in the literatnre simply as cedarwood oil. The most common ones, cedarwood oil Virginia, cedarwood oil Texas, and cedarwood oil Atlas, are derived from J. virginiana, J. mexicana, and C. atlantica, respectively. Others such as cedarwood oil Himalaya, cedarwood oil East Africa, and cedarwood oil Japanese are obtained from other conifers (arctander). Juniperus ashei Buchh. is also used as a source of cedarwood oil other species (e.g., J. erythrocarpa Cory and J. scopulorum Sarg.) containing high oil content are potential sources. ... 

---