Description
Medium-sized, clump-forming, bushy deciduous perennial (H 60-90 cm, W 70-100 cm). Leaves broadly lanceolate to heart-shaped (20-30 cm), distinctly longitudinaly ribbed, wrinkled, hard, light blue-green. Flowers in clusters on upright stems, simple (2 cm), light grey-violet. Flowering period: July-August. A good ground-covering perennial for shade and semi-shade, needs nutrient-rich and always moist soils.