Query: Flora of Western Canada and Trees of the United States but not Northwestern United States
Domain: plants
Relevant documents:
Cornus alternifolia
Tsuga mertensiana
Fraxinus nigra
Acer macrophyllum
Pinus resinosa
Acer circinatum
Acer glabrum
Larix laricina
Jack pine
Abies amabilis
Salix bebbiana
Celtis occidentalis
Abies balsamea
Amelanchier alnifolia
Betula neoalaskana
Acer spicatum
Salix amygdaloides
Tilia americana
Picea mariana
Ostrya virginiana