This was verified with some sources, it turns out this was first described as a Hygrophorus. The spore shape and the cheilocystidia presence, size and shape were compared to the lit. and it was a match. The desc. for the Hygrophorus gruberi mentioned that the lamellae are concolorous with the cap when young.
Why you didn’t see these, I have no idea really. They were just sitting near the stump where I was taking photos for most the night, but then again so were about 60 others. At the time, we weren’t sure what these were, or if they were anything to care about. I passed them under Dimi’s nose when he showed up, and he suggested perhaps the C. gruberi.