Chemical Documentation of Allopatric Introgression in Juniperus

Abstract

Allopatric introgression, according to Edgar Anderson, is a potent source of variation and evolution in n-ature, Nevertheless, in spite of claims to the contrary, reliable documentation of this phenomenon in plants has not been forth- coming. In the present study, we examine chemical data from volatile extracts of leaf foliage obtained from an array of populations of juniperas virginiana and ).