I filled the box for
Accepted botanical name (Genus species):
and the box with the COL link.
http://www.catalogueoflife.org...

Here's an entry for it:

Thorny Burnet (Sarcopoterium spinosum)

It's a genus with only one species and it wasn't in our database, so that's why you got that message. The admins can override the message.

Thank You. Wish I'd have taken better/more photos. Growing at Ruth Bancroft Garden. Asked the curator, Brian Kemble to ID it for me via E-mail. I of course didn't have a clue. Saving this photo for an ID teaser in the 2018 photo contest.