Thanks Michael. Unfortunately this is a pic I took in April (had a phone vs Nature map issue so am only uploading some old pics now) and I can't see any others of the same plant on my phone. I'll try to look out for it again for a better sighting - which parts are needed for better ID?
The most important thing is a clear pic or pics of the seedhead, but also leaves & the whole plant. But you may have to wait until there is new growth, maturity etc later to get such photos. Winter specimens are generally poor.