Ailanthus: I kinda see what you mean, but the specimen in question has too many leaflets.
I have a feeling it may turn out to be a subtropical one, which could be a tough nut to crack.
I agree a difficult one to give an accurate id pictures of flowers and seed/fruit will be needed I mentioned Tree of Heaven having owned a few years back they grow like magic beans and in different climates have different forms let alone male and female characteristics
The tree is in Stormsriver Village, Eastern Cape (Gardenroute / Tsitsikamma), South Africa.
Every year all the branches with leaves falls off and only the main stem is left over. Next year it gets new branches and it grows even taller. This one is about 13m high
Acaia elata, Aralia (but the spines rule it out), Paraserianthes lophanthato (what used be Albizia) - all are wrong but I can't find one that matches.
I have searched PlantZAfrica without success (but I don't feel my search was very efficient, so good chance I missed it; and there are about 1,700 native species of tree in South Africa; and it may not be native)
I suggest you ask the folks at Kirstenbosch
Hi All, the guys ar Kirshtenbosch was very helpful and spot-on.
Here is the answer:
This is Schizolobium parahyba – I know it as the Feather Duster tree, but seems also to be called the Brazilian Firetree or Brazilian Fern Tree. See this Wikipedia link: