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? I have photos, but they're not detailed enough to distinguish, e.g., the shape of the hairs. All the flowers we saw were mostly white, except for one pale pink individual among white ones. I suspect all were C. nuttallii but would like help to confirm this. Other geophytes are uncommon in this region. We saw 3 Allium species, Veratrum californicum, and Lloydia serotina. Most of our plant-hunting was aimed at alpines such as Kelseya uniflora (success) and Aquilegia jonesii (almost entirely a failure owing to an earlier than usual flowering). We did stumble upon the tiny, rare orchid Cypripedium fasciculatum, though. Thanks, Jane McGary Portland, Oregon, USA