Dove's-foot Crane's-bill

I completely forgot to post yesterday despite ample time, so two posts today to make up.
This was growing at the base of the wall on the pavement where several other plant-posts have originated. There are an extraordinary number of species growing along this 100m stretch of wall, either unnoticed or considered mere 'weeds' by the average pedestrian. I must count them one day. 
Dove's-foot Crane's-bill, Geranium molle, looks like Small-flowered Crane's-bill but is distinguished by having long hairs rather than adpressed down on the stems, all ten stamens have anthers (rather than just five) and the fruits are smooth (see microscope pic).