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Phytologia (August 2011) 93(2) 245 GEOGRAPHIC VARIATION IN THE LEAF ESSENTIAL OILS
 

Summary: Phytologia (August 2011) 93(2) 245
GEOGRAPHIC VARIATION IN THE LEAF ESSENTIAL OILS
OF JUNIPERUS CALIFORNICA
Robert P. Adams
Biology Department, Baylor University, Box 97388, Waco, TX
76798, USA, Robert_Adams@baylor.edu
ABSTRACT
The volatile leaf oils of Juniperus californica were analyzed
from throughout the species range in the United States. Three groups
of J. californica were found: the Central Valley, the deserts of southern
California, and a northwestern Arizona group. The oils of the Central
Valley populations were very uniform and very low in -pinene, with a
moderate amount of sabinene, and high in camphor. Their oils contain
8 diterpenes not found in other J. californica populations. The oils
from the southern California desert populations ranged from Vasek and
Scora's `Cal A' oil [high in -pinene (30.3%), sabinene (19.3%) and
low in camphor (5.8%)] to `Cal B' oil [moderate amounts of -pinene
and sabinene and a high concentration of camphor (21.9%)]. However,
the chemical races of Vasek and Scora (1967) were found as a mosaic
that did not fit any geographic pattern in southern California. The

  

Source: Adams, Robert P. - Department of Biology, Baylor University

 

Collections: Biology and Medicine