Query: Plants found in Alberta but not found in Northwestern United States
Domain: plants
Relevant documents:
Phacelia hastata
Selaginella wallacei
Isoetes bolanderi
Erigeron trifidus
Rhododendron groenlandicum
Melica hitchcockii
Cnidium cnidiifolium
Yucca glauca
Jack pine
Trichophorum clintonii
Viburnum trilobum
Rhododendron columbianum
Houstonia longifolia
Perideridia gairdneri