Actually, there are few things being moved unless they are improperly placed. Botanists just follow a set of rules set out several hundred years ago which sometimes require a plant to be moved from one genus to another.
This plant wasn't ever put into a "slot" by a botanist but instead by A.B. Graf in his book. Mr. Graf was a horticulturist, not a botanist and many of his photos have bad captions but the current editors of his book refuse to correct known errors.
Botanists rarely take on a plant to describe it formally unless they know exactly where it originated in nature and no one knows to this day about Caladium praetermissum. I have an unknown Philodendron in my own collection that is stunning and we've only recently learned where it likely came from in Ecuador. Dr. Croat has been hesitant to give it a name but we may be able to do so this summer if it produces an inflorescence that can be properly dissected. All the dried material is already in the Missouri Botanical Garden herbarium.
I have corresponded with Wilbert on a fairly regular basis since he is the world authority on the genus Amorphophallus. Wilbert used a plant in the Botanical Garden of Munich which had already been determined to be a Caladium but little other work had ever been done other than considering it might be a form of Caladium bicolor.
The name "praetermissum" means overlooked or forgotten.
