Oenothera glazioviana Large-flowered Evening-primrose DD I
It isn't obvious from the photo that the plant was about 1.4 m tall and the flowers were nearly the size of dinner plates but they were. This was an extra from our search on Jersey for the Echium plantageneum (Purple Viper's-bugloss) which grew nearby.
O. glazioviana is common in England and very common in the south east but less common in Wales except at the coast. It is uncommon in Scotland and Ireland.
Nature reserve, St. Ouens, Jersey 21st June 2004
Added on November 23rd 2004, amended January 30th 2005, updated 20th January 2011