1.  Yellow corydalis is locally here known simply as ‘the Portsmouth weed’.  It seems to crop up on walls and crevices everywhere here.  Probably, a lot like Buddleja, it will have found a niche environment post war on old bombsites [Gosport, Hampshire, December 2015].

2.  Yellow corydalis – gypsy fern (Sussex); I work in a garden with a gravelly drive full of the stuff [e-mail, December 2015].

Image:  Bedford, Bedfordshire; August 2015.