Glorious drooping panicles of fragrant white flowers put on a great show in early summer; the display is especially effective against a backdrop of conifers, says Sternberg. Yellowwood is native to the mid-Atlantic and the Midwest but is now very rare in the wild. It is prized for its smooth, silvery bark, "second-best to beech," in Bell's opinion. The flowers are luxurious, and a bee magnet, but yellowwood doesn't bloom until trees are over 12 feet tall, and then the blooms are best every second or even third year. Fall foliage is a soft yellow. It grows 30 to 50 feet tall with a wider spread. Prune it from an early age to encourage a graceful mature form, Sternberg advises. Hardy in Zones 4 to 9.