So - I just tried doing this with a picture of an unknown plumeria which was in one of the threads in the plumeria forum. I was going to add it to the general entry for Plumeria rubra.
When I typed 'Plumeria rubra' in the search box, it gave me about 25 options of various cultivars of Plumeria rubra, but not the general one, and certainly not the full complement of Plumeria rubra varieties. What could be causing this?
I got a similar result when I typed in 'Plumeria' by itself.