Summary: Phytologia (April 2011) 93(1)132
THE TAXNOMIC AFFINITY OF A JUNIPER POPULATION
FROM COLONIA PACHECO, MEXICO
Robert P. Adams
Biology Department, Baylor University, Box 97388, Waco, TX
76798, USA, email Robert_Adams@baylor.edu
The taxonomic affinity of junipers from Colonia Pacheco was
examined using volatile leaf oils, nrDNA SNPs, morphology, and
ecology. The leaf oil was compared with oils from J. scopulorum
(Durango, CO), J. blancoi, J. b. var. huehuentensis and J. b. var.
mucronata. The juniper population at Colonia Pacheco appears to be
the northern-most known population of J. blancoi with its leaf oil
containing a few components characteristic of J. scopulorum suggesting
gene exchange in the Pleistocene. Phytologia 93(1): 132-145 (April 1,
KEY WORDS: Juniperus scopulorum, J. blancoi, J. b. var.
huehuentensis, J. b. var. mucronata, leaf terpenoids, geographic
variation, nrDNA, SNPs, Pleistocene refugia.
In a previous study, Adams (2011) reported that the leaf