NATURAL PINE HYBRIDS IN ALBERTA

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Abstract
In central and northwestern Alberta, where the ranges of Pinus contorta var. latifolia and P. Banksiana overlap, there is abundant field evidence of hybridism between these species. Numerous trees have been found with cone and other characters more or less intermediate between those of the two species. These trees are generally found in proximity with, but rarely apart from, the putative parent species. Various diagnostic characters for the species are briefly evaluated m interpreting the polymorphic hybrid population. Characters of the mature seed cones are used to distinguish several pine types in the region and as a basis for a discussion of problems requiring further investigation.

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