I've been finding lots of the black velvet types of milkies this summer. Posted an observation a week or so ago That I called L. subgerardii. Based that guess on the subdistant gills. They were found in mixed woods, lots of hemlock. This latest such obs features mushrooms growing in a spruce stand. The gill adges appear to be darkened. So habitat + this feature leads my to Roody's "Sooty Spruce Lactarius."