>On a recent trip to Colorado and the Beartooth and Bighorn ranges in Wyoming, we saw Calochortus in several places. I'm having trouble deciding whether these were Calochortus gunnisonii or Calochortus nuttallii, or one species in one site and the other elsewhere. Both species are reported to occur where we were, and both are quite variable. Can anyone advise me about distinguishing characteristics? Check this out. http://swcoloradowildflowers.com/White%20Enlarged%… The band of maroon is apparently diagnostic for C. nuttallii. Bob Nold Denver, Colorado, USA