Vancouveria hexandra 2lt
Shade loving perennial related to Epimedium with attractive light green scalloped leaves. Clean white flowers from delicate stems hang over the foliage like little white clouds.
Vernonia missurica 2lt
Perennial that should be more commonly grown, related to Aster family but not so prone to mildew. Tall up to 2m in height and a riot of vivid purple flowers in late Summer/Autumn.