A better picture of the leaves and overall habit would help. But what I can see from the leaves doesn't look like geranium.

I agree with the above comment. Many flowers are nearly identical so it helps to have a shot of the whole plant, especially the leaves. The anthers in this one do not look like G. maculatum to me.

Geranium nodosum?

thank you all. Here's a photo of the leaves. The images I've seen of G. nodosum look pretty close to what I have.

It's still an 'artistic' shot taken from an unusual angle. We need a clear picture of entire mature leaves. Young leaves from the growing point of a plant are not necessarily typical.

oops! Sorry about that. Here's a straight-on shot of a mature leaf--no art was used in the making of this image ;-)

It looks like nodosum to me - while I freely admit to not knowing all the geranium. I've grown g. nodosum Svelte Lilac for years in dry shade. A little bit coarse looking without any care at all but still has its own charm.

Thanks folks! G. nodosum it is.