Celery-Leaved Buttercup

A walk on Wem Moss Nature Reserve this afternoon, a very wet lowland bog where wellies are a must at any time of year.

I saw this flower that I didn't recognise. It wasn't in any of my wild flower books but I found it on the internet eventually. It was a good afternoon for birds too - I saw a female hen harrier (photos not very good though) and some stonechats.