Frasera

Frasera, the green gentians, is a genus in the gentian family, native to North America and named for John Fraser, a Scottish botanist and colleague of Thomas Walter.
Taxonomy.
Historically, "Frasera" has sometimes been considered part of "Swertia", but molecular analysis of a number of "Frasera" species has shown them to form a monophyletic clade separate from the rest of "Swertia".