Bob Nold wrote, Check this out. http://swcoloradowildflowers.com/White%20Enlarged%… > The band of maroon is apparently diagnostic for C. nuttallii. > In one population, on the roadside during our drive from Steamboat Springs to Cody, Wyoming, we saw one or two individuals with the maroon (dark brownish red) band, and others without it. The latter were simply white with a yellow throat. Jane McGary