![Image](https://i.imgur.com/K4vMhYI.jpg'%20/)
There are some patches of it which must have been planted by a contractor, such as outside the fire station, but it also seems to grow happily as a self seeded weed from a crack in the pavement.
It flowers for a long time, and can obviously get by with little or no care, but I haven't been able to find it in a garden centre, or books.
I can post a closer view of the flowers if that would help.