The neutral leaf oil of the creeping juniper from the Prairies was analyzed by gas–liquid chromatography. d-Sabinene (36.5%) was found to be the major constituent, and smaller amounts of d-limonene (17.5%), p-cymene (3.0%), d-α-pinene (1.6%), γ-terpinene (0.4%), d-terpinen-4-ol (4.6%), linalool (0.8%), citronellol (0.8%), γ-cadinene (1.3%), l-elemol (3.8%), α-cadinol or γ-eudesmol (1.6%), and impure α-cyperone (3.9%) were isolated. α-Thujene (3.0%), camphene (0.2%), β-pinene (0.3%), myrcene (3.0%),β-phellandrene (0.2%,), terpinolene (0.1%), 2,4-(8)-p-menthadiene (0.1%), methyl citronellate (0.4%), and geraniol (0.2%) were tentatively identified. The composition of this oil closely resembles that of Rocky Mountain juniper leaves. A small amount of the oil from a hybrid of these two species was analyzed and the possibility of detecting hybridization by analysis of the leaf oil is discussed.

The neutral leaf oil of Rocky hlountain juniper was analyzeti by gas-liquicl chromatography. (1-Sabinene Lvas found to be the major c o~l s t i t~~c~~t (45.7y0) and smaller amounts of d-limoncne (11.4%), d-0-piliene (I.%%), yterpinene (l.l5'%), p-cynlene (1.-45&), 1-linalool (1-tcrpi~len-4-01 (2.9%), citro~lellol (0.2%), 1-p-elernene (0.2-0.370), three isomeric cndi~ienes (2.57;), I-elemol ((i.O'j&), and safrole (I.S50j0) \\.ere isolated.