I can't say enough great things about the simple Camelia. They are a throwback from the past generation of gardens. Where there are still mature Junipers, Rhododendrons and Azaleas there are almost always a few mature Camelias. I had that garden when we first bought the house and it was beautiful for the first few years. Rhododendrons, Azaleas and Camelias really know how to flower.
Unfortunately the watering system was not automatic. I was very conscious of the drought that we went through when I first moved in so I didn't turn it on very often and slowly the plants that needed regular water faded. And then the water system broke.
The only thing that has survived to this day are the Camelias. I cut them and they grow back. I never water them and they bloom every spring. They are one of the best plants to grow in a Northern California garden, and with so many options of colors and types, they can keep you occupied almost as long as the roses do when you are choosing which one to buy.
Botanical Name: Camelia japonica (with many, many varieties, other species and cultivars)
The one in the picture is located in Sebastopol, CA where it is shaded by a liquidamber tree. I grow them in Oakland, CA where I live. One caveat is that you need to take care of them for the first few years after you plant them at which time they should have a well draining soil and moderate to regular water. Once established they will outlive all the plants.