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Angiosperm Flora of India

Pinus contorta var. yukonensis var. nov. (Pinaceae) from south–central Yukon, Canada

Publication Type:Journal Article
Year of Publication:2010
Authors:Strong, WL
Journal:Nordic Journal of Botany
Volume:28
Issue:4
Date Published:2010
ISBN Number:1756-1051
Keywords:Pinaceae, Pinus
Abstract:

Pinus contorta Douglas ex Loudon var. yukonensis W. L Strong (Yukon pine), a new variety, is described from south–central Yukon, Canada. It is a stout tree with long lower branches, often with paired lower and forked upper stems, and weakly platy to smooth gray bark on the lower stem, when < 70 years old; with bark on the lower stem becoming furrowed and platy on older trees. This contrasts with the narrow columnar habit, simple stem, and scaly bark associated with the more common inland var. latifolia. In several respects, var. yukonensis is more similar to var. contorta (a coastal variant), although occupying a different ecological regime and spatially disjunct (i.e., a high latitude and high elevation variant). Variety yukonensis may represent the taxon alluded to in previous leaf oil terpene and genetic studies, and a possible Beringian survivor.

URL:http://dx.doi.org/10.1111/j.1756-1051.2010.00824.x
Short Title:Nordic Journal of Botany
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