Apparently, Landscape with snow was once considered bogus. But no, it wasn't a case where the artist tried to palm-off multiple pictures of the same damn tree.
And note how this painting runs the whole gamut of Group of 7 concerns, featuring rocks, a tree, AND snow. Artist Tom Thomson must have really been stoked, as he went ahead with it even after running out of red and green pigment, which he probably blew on this painting.
Heffel Fine Art Auction House is hoping that Landscape fetches +$1,000,000 at auction, but I think the lack of reds and greens will mean they get docked a few bucks.