Hohenbuehelia is plausible and is what I'd probably call it, tentatively, as I collected it - but I'd certainly want to look at it microscopically to be sure of an ID.
Thanks. This was the second fungus species in this location that was suggested to be a species we have not recorded on CNM - I assume possible accidental import when the pines were planted. Not worth investigating further, as this particular plantation is currently being harvested.