Photo taken 15/8/11 on the Grand Union Canal, near Milton Keynes, Bucks.
An introduced species from North America, it is now widely found beside rivers, ponds and canals. It flowers between June and September.
Photo taken 6/8/11 near Henley (though it was actually on the Berks side of the Thames)
Photo taken 6/8/11 near Henley (though it was actually on the Berks side of the Thames)
Photo taken 6/8/11 near Henley (though it was actually on the Berks side of the Thames)