title: The early bud gets to warm.
authors.affiliation: Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada.
authors.forename: Robert D
authors.initials: RD
authors.lastname: Guy
mesh_terms: D058865:Introduced Species; D018515:Plant Leaves / Q000502:physiology*
keywords: balsam poplar (Populus balsamifera); bud break; chilling requirement; climate warming; dormancy; heat sum; phenological flexibility; phenology