This one entered my garden as an interloper with some seed for G. wlassovianum (at least, I think this is not that species). It's been with us for years now, and despite its small flowers (the hoverfly in the first photo gives you a sense of scale) it self-seeds amply, so that it is now almost a weed. The leaves are somewhat different from most other cranesbills, a simpler shape. Unlike most cranesbills, this one closes its flowers when it's not receiving full sunlight (second photo). Any ideas as to its identity?

I don't see well leaves, maybe Geranium palustre

Thanks. That looks like a candidate. I just took a picture that shows the leaves more clearly (it's raining here ) and the leaves do seem like a good fit to photos I've found for G. palustre. I'm not so sure about the flowers: all photos of G. palustre appear to show the petals held distinctly separate, while on my plants the petals interleave to give more of a cup shape. Another comments I found elsewhere about G. palustre that gave me pause is that "it produces few leaves", whereas my plants produce quite dense mounds, as exemplified in the photo below. That could be variability within the species; the patterning on the petals is similar, as far as I can tell.

I think that it is a match Geranium palustre
the colour and the shape of the petal does not act
This species is from the swamp,on the basis flower petals are densely hairy