garland, Check out the UC-Davis Fruit & Nuts Research Center website, and the California Rare Fruit Growers' website(they also deal with stuff that's not 'rare'). Lots of info there, as well as contacts who can direct you to sources - &/or tell you what will or will not work in your area. Years ago, I was interested in pistachios, too; but Dr. Louise Ferguson at the UC-D F&NRC told me that they wouldn't work here in the hot, humid Southeast. I tried a few P.vera seedlings anyway - and she was right.

I will add: Camphor Tree, if you have enough space, the roots can be expansive. The leaves smell aromatic. This can be a big tree and should not be planted too close to the house or sidewalks. Pepper Tree Spanish Cork Oak, they are drought tolerant and don't get too big, and have amazing squishy bark, this is where cork stoppers on wine bottles come from. Pomegranate grows exceptionally well in this climate. Even if you don't like eating them the fruits can be very decorative hanging from the tree, and the tree also produces pretty fiery orange blossoms. Pomegranate usually grows more like a giant bush-tree though, not really the best for shade. A lot of people have never tried a truly fresh pomegranate right off the tree, they taste much much better when really fresh. And a lot of people do not know the proper technique for cutting open a pomegranate and removing the arils, so they wrongly think eating pomegranate is too much work and too messy. When it comes to Mulberry trees, Persian Black is by far the best tasting variety. However, if you're in climate zone 10 Pakistan Mulberry will grow better and is also a good tasting variety, with larger fruit size too. If you go with a fruitless male Mulberry (as some people do to avoid all the messy berries falling), there could be pollen allergy issues (if not you, someone else in the neighborhood). The Black varieties are the best tasting, but the black berries can make a mess on the ground and stain the sidewalk, or get tracked indoors on your shoes on the carpet, so that's something that should be considered. Another little fact, mulberry leaves are not poisonous and can be fed to pigs or goats, a favorite food of silkworms too. Mulberry trees have beautiful shade foliage. If you're looking for some more exotic choices you might also see this thread: Sacred trees in India

reminds me of trumpet vine ... which can be a nightmare to eradicate ... but i dont really know CA .... ken https://www.google.com/search?q=trumpet+vine+leaves&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjx6ojxh-rNAhUH_IMKHVXZDFMQ_AUICSgC&biw=902&bih=745&dpr=0.9

I would definitely want a closeup of the leaves in your hand before going any farther than, “it appears to be a tree.”