Longleaf pines. Probably as much by feeling sorry for them, having lost such a staggering territory. Still, I enjoy the grass stage, the rush-for-the-sky stage (does this have a name?), and the adult pines with such long attractive needles, and their ability to grow (once started) just about anywhere not flooded too long. I love that longleafs are coming back, even if mainly by plantations. Here in SC, the pineland in many "natural" areas in the coastal plain is being brought back to longleaf. These areas are mainly the pinewoods uplands next to wetlands or river-valley sides that are the main objects of the protection.
If anyone enjoys longleafs, read "Looking for Longleaf," a thoroughly enjoyable semitechnical treatment. (I have no connection with the book; this is an innocent recommendation.)
http://www.uncpress.unc.edu/browse/page/141