Hard to tell because there is no indication of scale in the picture - are the leaves 1 inch or 2 inches or 3 inches long? Looks more like a perennial than a shrub. Perhaps Balloon Flower (Platycodon).

Boerhaavia?

Hi Casa, image shows that its a kind of succulent plant. I don't know exactly the name of this plant but you can explore from here: https://en.wikipedia.org/wiki/Succulent_plant All the best!

You're welcome. Those flowers are very small, but cute when viewed close up. Also, that's a tough plant, which seems unfazed by incidental foot traffic.