Coast redwood trees are magnificent by any standard. It's a handful of tiny, slow-growing redwoods that have Stanford geneticists puzzled. The trees are albinos. About 60 exist, and no one is sure how they can. After all, photosynthetic pigments are green. The albinos are dwarfed and are not healthy, but they shouldn't be living at all.
Thanks to Chad Arment for posting this first.