Frasera Walter. Columbo.
A genus of 15 species, annual, perennial, or monocarpic herbs, primarily of w. North America (Pringle 2023; Struwe & Pringle 2018). See discussion by Pringle (2023) of the uncertainty of generic concepts in Frasera and Swertia s.l., and the likelihood of further generic changes.
Ref: Drake (2011); Horn (1997); Pringle (2023) In Flora of North America Editorial Committee (2023c); Struwe & Pringle (2018) In Kadereit & Bittrich (2018); Threadgill & Baskin (1978). Show full citations.
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