Figure 3 - Areas of origin of alien plant species introduced into Canada, based on Udvardy (1975), Olson and Dinerstein (2002), and Morse (2006).

By areas of origin, the number of alien plant species introduced into Canada is:

• Afrotropical - 0 species
• Australasian - 1 species
• East Palaearctic - 75 species
• Nearctic - 23 species
• Neotropical - 15 species
• Oriental - 6 species
• West Palaearctic - 401 species