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I've been doing some searches, and for the most part the black racers look like they are pretty evenly colored. This guy/girl had some white between scales on the anterior, and showed me no propensity race away. ;-) Very graceful, and took it slow and easy. Looking at some other sources, but I'm leaning hard toward black ratsnake (Elaphe obsoleta obsoleta) from what I've seen so far.
These are definitely caladiums. We just moved from Florida to Georgia. They grow all over down there, as a matter of fact most of them come from Lake Placid, a stones throw from my home town. I would say the leaves on these are a little more rubbery than paperlike.