I regret I don't know the exact species of this mallow but it came from the Theodore Payne Foundation, a local treasure selling plants native to southern California. Drought tolerant, it seems to be in flower most of the year. It grows well also. I need to cut it back frequently so that I will be in compliance with the community garden rules not to intrude onto the path. It actually seems to be a large bush, and if I let it, will probably take over the plot, along with the nasturtiums.
Family Malvaceae, Lavatera sp.