I was taking some holiday time to peruse and study. I found the Dr. Bayse article linked below. I'm struck by the photo of R. abyssinica at the beginning of the article.
I'm wondering if the plant (tree) still exists. Is the height compared to the roof of the building an optical illusion? Is the huge double trunk one also? A black and white photo, but wow!
Here is a link that might be useful: AMPHIDIPLOID