Have driven past this tree several times now, wishing for a piece of it.
I love the slightly more delicate, smaller, clean and white flower, with the whorl of yellow in the centre.
Finally I called in to ask for some. The guy was older, very nice and gave me a huge hunk of it, as seen in the back seat of my car, below.
He looked somewhat Chinese, but he explained he was from the Solomon Islands, where apparently the Germans employed Chinese to work in the plantations there. He said he had Chinese and German in his past family. This is history about which I know nothing, but about which I will now do some research!
Here is his tree (below) in the guy's garden, the tree on the right. Lovely.