I can find on L. niveum indicates that this name is a synonym for L. holopus.

would favor the albellum hypothesis. Although it being a solitary specimen makes it more difficult to rule out the albino hypthesis, or the possibility that it is a sun bleached specimen of some other Scaber Stalk. B/R/B lists L. chalybaeum as an oak lover. The pics show a pale capped mushroom. L. luteum is pale capped and occurs in broadleaf forests. Tough to rule out L. scabrum as it is a very common mushroom.

This single mushroom was found on a high ridge top under oak.

the white birch loving Leccinum, there are often a number of them scattered about here and there, which leads me to guess they are holopus. Would an albinistic form of some Leccinum species tend to dominate a fruiting? Holopus types are listed by B/R/B as found in association with birch in bogs, but I have also seen them in mossy areas along upland trails in Vermont. Sometimes I find white specimens of L. scabrum (a common birch associate), but these often are seen in groups along with others that are gray capped.

that noone can possibly deal with them … I know the ones from Europe are very very difficult to distinguish how much more difficult has it to be in North America? You have about 200 described species names and it seems most of them are true species …

could mean an albinistic form of just about any Leccinum species

for albellum.
what was it growing with? And did you get any staining from it?

it could be holopus, but… it doesn’t have the right stature.