Fairy foxglove is a small, purple flower which grows intermittently on stone walls in north-east England. Local tradition says that it only grows where Roman soldiers have trod. And certainly it is to be found in the village of Wall (which is, of course, located near Hadrian's Wall in Northumberland).Vickery, Roy, Oxford Dictionary of Plant Lore, pub. Oxford University Press 1995 ISBN 0-19-280053-1 entry 'Fairy Foxglove' page 129.
