Photo taken 8/07/07 at Whipsnade Heath, Beds.
The Chilterns are a stronghold of Dark Mullein, and I see it quite frequently on my walks (a real hot-spot for it is Whipsnade Heath, just a mile or so from my home). It is shorter and less common than Great Mullein, flowering between June and August.
Photo taken on 10/07/20 at Pishill, Oxon.
Photo taken on 22/07/07 at College Lake, near Tring, Herts.
Photo taken on 10/07/20 at Bix Bottom, Oxon.
Photo taken 8/07/07 at Whipsnade Heath, Beds.