Frasera Walter. Columbo.
A genus of 15 species, annual, perennial, or monocarpic herbs, primarily of w. North America (Struwe & Pringle 2018).
Ref: Drake (2011); Horn (1997); Struwe & Pringle (2018) In Kadereit & Bittrich (2018); Threadgill & Baskin (1978). Show full citations.
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