Dwarf Crested Iris
Considered by many to be the finest Iris native to the US. This spectacular woodland groundcover spreads to form short, dense colonies of violet blue flowers with golden crests. Swordlike leaves reach 6" at most, and are accompanied by drifts of upward-facing blue flowers borne on 3" stems in the spring. Rich, well drained soil in full sun to almost complete shade. Zones 3-9. Native.