FLOWERS - MARSH WOUNDWORT

Click to enlarge.

A few contenders here, notably the evil Giant Hogweed around the Walthamstow reservoirs or the Field Pansy in the Lower Paddock.

The Marsh Woundwort gets it for me though, growing alongside the Thames, if only for the "cow-pat fly" in the shot too. An impressive, albeit common plant.

Photo taken in July, with the phone.