This North American introduction has escaped, in my opinion, far further than Stace suggests. I see this so often near the seaside that I would be disappointed not to find a naturalised clump somewhere growing out of a wall, rocks or in dunes.

This alien has spread mostly to sites along the south coast of England but is also found inland as well. There are a few sites on the coast of Wales and even fewer in Scotland and Ireland.

Red Rocks, Edge of Golf Course, 28th June 2005

Added on August 19th 2005, updated 7th January 2009, updated 29th March 2010