Original sentence: Although Hypericum perforatum is grown commercially in some regions of south east Europe, it is listed as a noxious weed in more than twenty countries and has introduced populations in South America, India, New Zealand, Australia, and South Africa
Edited sentence: Although Hypericum perforatum is grown commercially in some regions of south east Europe, it is listed as a noxious weed in more than twenty countries and has introduced populations in North and South America, India, New Zealand, Australia, and South Africa