A genus of 3 species, dwarf shrubs, of ne. North America. A preliminary molecular study suggested that H. tomentosa might warrant generic status separate from H. ericoides and H. montana (Guzman & Vargas 2009); a more detailed study shows Hudsonia as here circumscribed as monophyletic and sister to Crocanthemum (Biver et al. 2016).
Ref: Arrington & Kubitzki In Kubitzki & Bayer (2003); Biver et al. (2016); Guzman & Vargas (2009); Morse (1979); Skog & Nickerson (1972); Strother (2015d) In Flora of North America Editorial Committee (2015). Show full citations.