Finding these rooted me fast, stabbing a map of the gargantuan Darwinian cosmos with a tiny pushpin labeled "you are here." The kapok tree spends its life growing these only to release them to the earth, where they dry, twist, crack and split, releasing flossy seeds to the winds. Ergo, more kapok trees, and more kapok - the principal flotation agent in lifejackets. I found this on the front lawn of the Los Angeles Natural History Museum just before seeing the intoxicating and brilliant multimedia exhibit L.A.: light / motion / dreams. Seed tufts littered the grass there, an L.A. species declaring its turf.