Red Valerian (Centranthus ruber) | Naturescape Wildflower Farm
Jupiter's Beard, Red Valerian: A Portrait of a Perennial Flower | HowStuffWorks
centranthus ruber atrococcineus - The Beth Chatto Gardens
Red valerian: characteristics, care & varieties - Plantura
Agroforestry Research Trust - Red valerian (Centranthus ruber) has nice edible younger leaves that taste of broad beans. Like a dry sunny site and often seen growing out of walls in England.