Lesley a bit hard to tell from the photo what this one is. a close-up of the leaves would be good - my first guess is River Lomita - Do yo think that this Id is likely?
When I blew photo 2 up I could definitely see it had compound leaves, as in Polyscias sambucifolia, and there was no sign of teeth on the leaflet edges. I am happy to make this a definite iD. Like Michael, I would have liked a decent closeup of a leaf or two on a stem, on a background like a plain T-shirt if it difficult to get a shot of a single leaf, before committing myself to subspecies. If you are in the area when it is flowering, a shot of the flowers on this plant added to this sighting would be good.