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familySalicaceae genusPopulus Show Lower Taxa Populus angustifolia, Populus balsamifera, Populus deltoides, Populus fremontii, Populus grandidentata, Populus

also differ from P. balsamifera in having capsules with 2–4 sparsely hairy or glabrous valves (T. C. Brayshaw 1965). Populus balsamifera also hybridizes and

Populus tremuloides Populus heterophylla Populus trichocarpa Populus balsamifera Populus angustifolia Populus deltoides Populus deltoides subsp. deltoides

Dakota based on specimens of P. ×jackii (P. balsamifera × P. deltoides). It hybridizes with P. balsamifera to form P. ×hastata Dode along the northern

×generosa A. Henry (P. trichocarpa × P. deltoides), P. ×jackii Sargent (P. balsamifera × P. deltoides), and P. ×acuminata Rydberg (P. angustifolia × P. deltoides)

Argus Common names: Balsam willow IllustratedEndemic Synonyms: Salix balsamifera Barratt ex Andersson Salix pyrifolia var. lanceolata (Bebb) Fernald Treatment

Populus tremuloides Populus heterophylla Populus trichocarpa Populus balsamifera Populus angustifolia Populus deltoides Populus deltoides subsp. deltoides

other two native species of sect. Tacamahaca, P. balsamifera and P. trichocarpa. The hybrid with P. balsamifera, P. ×brayshawii B. Boivin, differs most obviously

P. tremuloides does not hybridize naturally with P. angustifolia, P. balsamifera, or P. deltoides. The correct identification of such specimens is discussed

complex mosaic of successional types with abundant Alnus crispa, Populus balsamifera, Betula papyrifera, and Salix spp. The Cordilleran region (zone 2) is

mariana, Pinus banksiana, Betula papyrifera, Populus tremuloides, and P. balsamifera, are distinct from but closely related to Eurasian species. Many of the

including willow, juniper (Juniperus communis), balsam poplar (Populus balsamifera), and white and black spruce. The modern landscape mosaic of herb and