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Varieties There are two Juniperus occidentalis varieties , treated as subspecies by some botanists : Ancient tree The Bennett Juniper in the Stanislaus National Forest of California is considered the oldest and largest example at possibly 3000 years old , with a height of 26 m and a diameter of 3.88 m. Habitat Juniperus occidentalis usually occurs on dry , rocky sites where there is less competition from larger species like Ponderosa Pine and Coast Douglas-fir .
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