Thanks Janet! I hadn't even clicked on your links and those are good photo examples! I was even beginning to think it was a weed like Phyllanthus but I believe you nailed it with Acacia koa and they do have that species growing at the San Diego Zoo! http://www.sandiegozoo.org/CF/... as well as a few other varieties: http://www.sandiegozoo.org/CF/...
~ I'm an old gal who still loves playing in the dirt!
~ Playing in the dirt is my therapy ... and I'm in therapy a lot!