Tall Blue Lettuce (Lactuca biennis (Moench) Fernald)

↑Range - Expand

Legend	Color
Native
Expanded
Native or Not Present
Native or Expanded
Native or Expanded or Not Present

This tentative map is based on our own research. It may have limited data on Canada and/or Mexico, and there is some subjectivity in our assignment of plants as introduced vs. expanded. Read more in this blog post.

This species has expanded south slightly at the western border of its range; it is a weedy plant with wind-dispersed seeds, and is rarely planted. It is likely expanding due to new habitat humans have created, such as the disturbed and edge habitats it favors.