Query: Trees of the West Coast of the United States
Relevant documents:
Populus trichocarpa
Pinus contorta
Pinus ponderosa
Acer macrophyllum
Tsuga heterophylla
Sequoia sempervirens
Alnus rubra
Arbutus menziesii
Picea sitchensis
Abies magnifica
Abies procera
Pinus lambertiana
Fraxinus latifolia
Thuja plicata
Abies grandis
Picea engelmannii