Query: Trees of Manitoba, Saskatchewan, or Alaska
Domain: plants
Relevant documents:
Cornus alternifolia
Populus balsamifera
Populus trichocarpa
Taxus brevifolia
Tsuga mertensiana
Celtis occidentalis
Picea sitchensis
Populus deltoides
Pinus resinosa
Abies lasiocarpa
Betula neoalaskana
Thuja plicata
Tsuga heterophylla
Tilia americana
Jack pine
Picea mariana
Callitropsis nootkatensis
Picea glauca