Sometimes you pass by things and don’t really notice them. So it is with this Christmas tree on the roof of the building at Seventh Avenue and Lincoln Place in Park Slope. It graced the neighborhood with its rooftop display during the holidays and, well, it’s still there, looking crispy and formerly festive. Sadly, it will be even more past its prime for the ’08-’09 holiday season, which will start in a mere eight months or so. Until then, Permanent Christmas in Park Slope which is especially meaningful on Easter weekend.