Oxford ragwort, Senecio squalidus.
A real railway flower. It’s a hybrid between two Senicio species native to Mount Etna that was introduced to the Oxford Botanic Garden in 1690. By the end of the 18th century it grew on almost every wall in and about Oxford. During the Industrial revolution ragwort seed was distributed around the country via the thriving railway system that radiated out of Oxford. Photo: Stephen Middleton.
