The Genus Corallorhiza
Merten's Coralroot: Corallorhiza mertensiana - The flowers are reddish-purple and lack longitudinal striping. The flowers are a dull purple or pink color. The spur is prominent.
Striped Coralroot: Corallorhiza striata - The flowers are flesh-colored with prominent purplish to reddish-brown striping. The spur is missing.
Northern Coralroot, Yellow Coralroot: Corallorhiza trifida (Synonyms: Corallorhiza corallorhiza, Corallorhiza corallorhiza var. coloradensis, Corallorhiza innata, Corallorhiza verna, Corallorhiza wyomingensis) - The lower lip is whitish and usually not red-spotted, although there may be spots in the throat. The stems are yellowish. The spur if present is attached to the top of the ovary.