The tallest trees in North America east of the Rocky Mountains are the tulip trees (Liriodendron tulipifera), to which I am particular. One of our sites is characterized by several tall, lovely tulip trees, while my primary worksite, to my knowledge, had no tulip trees. A couple of years ago, I decided to remedy this deficiency, and planted a handful of tulip tree seeds onsite. The seeds take a while to germinate, but my little experiment finally paid off- here's the larger of the two:
With luck and the right weather conditions, in fifty years, this is going to be a giant, beautiful shade tree, even if I'm not around to benefit from sitting under it.