Lespedeza thunbergii "Pink Fountain" (Pink Bush Clover)
Lespedeza thunbergii "Pink Fountain" grows to an impressive six feet in height at maturity, which doesn't take all that long to achieve, and at least half that that in width. "Pink Fountain" does just what its name implies, too: it sends forth cascading branches laden with beautiful pea-like, two-toned pink blooms from top to bottom in late summer. This native to Japan likes sun/part sun in Zones 4-9. Quarts.
Lespedeza thunbergii "Gibraltar"
"Gibraltar" is considered the standard by which ornamental Lespedeza is judged. It grows to six feet tall, almost twice that in width, and its arching stems are smothered in two-toned, pink and purple blooms in late summer/early fall. It's a deciduous shrub in cold areas, but if you cut it to the ground in early spring, it will quickly reach its height. Gibraltar is easy to grow in ordinary soil, full sun/part shade, and is somewhat drought tolerant. Zones 4-9. Quarts. (Photo by Sten Porse (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons)