Well, still not sure about these, but Hebeloma is a good idea. I looked around for images of hebeloma, there is stuff out there, mostly from Europe. This looks like the closest:
http://mycokey.com/...
It turns out there are a number of veiled brown capped western hebeloma. I just ordered Alex Smith’s Veiled Hebeloma of Western US from Amazon, so I will get back to this when that comes in.
