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This category includes the Flora of Western Canada, in North America. It includes flora taxa that are native to Western Canada. Taxa of the lowest rank are always included. Higher taxa are included only if endemic. For the purposes of this category, "Western Canada" is defined in accordance with the World Geographical Scheme for Recording Plant Distributions. That is, the geographic region is defined by the political boundaries of its constituents:

• Alberta
• British Columbia
• Manitoba
• Saskatchewan