Centranthus is a flowering plant genus comprising herbs and subshrubs native to Southern Europe. It is in the Valerianaceae family. There are about twelve species in the genus. Some Centranthus are known as introduced species in other parts of the world, including Centranthus ruber in the western United States and Centranthus macrosiphon in Wester... Found on http://en.wikipedia.org/wiki/Centranthus
(Valerian) Centranthus is a group of hardy annuals and perennials native of Europe, and North Africa to Turkey. These plants are commonly known as Valerian. C. ruber, the Red Valerian, forms loose clumps of blue-green, lance- or oval-shaped leaves. Its small, star-shaped, dark red-pink flowers are borne in heads above the leaves from late spring to... Found on http://www.encyclo.co.uk/local/10004