California Gardening: Mystery shrub id, 3 by carefreecynthia

carefreecynthia wrote:
A friend here in Panama told me this shrub is common is California, so I am hoping someone can ID it. No one here knows.
Grows in full sun or full shade. No visible flowers, but seedlings pop up, so it must be doing something. Milky sap. No suckers. Leaves are green underneath. Takes shaping well. Tree, shrub or just about any size and shape is common here.
Euphorbia like, but?
Tried getting an ID on the tropical group, but no luck. Suggestions were Ficus, Excoecaria, Plumeria, Synadenium, but doesn't look like that.