thanks for the welcome, planthelper. I'll be able to take much nicer photos in 3-5 business days I'm not so close to the mother plant anymore, but its grown in a z9 temperate coastal forest, in rich soil, in the northern hemisphere. It was probably planted as some kind of ornamental there ~50 years ago. Currently its growing a bit bushy with many saplings nearby, but it gets chopped down to a stump every so often so it could possibly grow to a tall tree. The original owner of the plant is a mystery to me, so they could have been eccentric about collecting obscure plants or attracted to a random one at the local nursery. At any rate it is very different from the other acacias I have seen in the surrounding 10 miles or so, especially since it has the long broad phyllodes and the arrays of small leafy things. Acacia sophorae looks about right to my untrained eye, except that the pictures I see of it online don't have the boomerang shaped phyllodes as much. Thanks for the help!