Photo taken 3/05/08 near Tring Station, Herts., on Walk 4 of the Chiltern Chain Walk.
This is a garden plant that is becoming established in woods and hedge-banks. It flowers between April and August. I saw it several times on my second Chiltern Way walk.
Photo taken 24/04/09 near Drayton Beauchamp, Bucks.
Photo taken 2/05/07 near Sonning Common on Day 17 of my second Chiltern Way walk.