Thanks June. I looked up some pictures online, and it's another close one. There are very few pictures of it online though. One description said that C. laetum has rounded ends, and mine look kind of pointed to me. Other than that, it's the only thing I can see that is different.
I've been looking on the links that Rick posted, and I'm starting to think that it could be C. montana. Not at all sure though!
I may have to give up on this quest. So many of them look alike, and it may be impossible to ever figure out which one it is. My main goal was to be able to post the pictures in the database, under the correct name.