The succulent site has a Contact link at the bottom. Just because they added a teeny tiny "Photo via DavesGarden' does not make it right. The copyright is quite clear "Unauthorized Use Prohibited" Just because they cropped that out does not excuse them from outright theft!
I can't find any info who owns the site, their terms do mention a copyright rules, too bad they don't use it. They do mention that the site is controlled by "Perfect Insight, Inc." which, according to several online sources, is resolved.
I personally would demand it's removal, just for the fact that they deliberately removed that copyright.
