I tried to edit my post, but couldn't, to say that you may have to wait until a bloom appears, since the leaves could be attributed to many 'familiar looking' plants. Presently, our Heliconia psittacorums and Heliconia schiedeana are in full bloom and have been for the past few months, but am not sure when they bloom in your area of Florida. If, it is a Calathea, they seem to thrive on neglect, in that they only require watering when it is extremely dry. As does Heliconia psittacorums and Heliconia schiedeana where here they receive absolutely no additional water during the dry season that last from Jan-May... in our area at least. Obviously, none of the above don't like the cold. Good luck.

I've sent the picture to a bunch of plant experts. Do you have the nursery name where you purchased it? Perhaps the owner would know more than the clerk. Where in Florida, if I may ask. The people to whom I've sent the photos are well known experts and curators at arboreta. Some work in Florida.

The first one looks like my stephanandra incisa "crispa" -- a low shrub. I know I brought some to the swap. It will sprawl, makes a lovey low mound but the "mama" plant is about 4 feet across by 1.5-2 feet high right now (so give it some width to grow in). It will root wherever a branch contacts the ground so you will get many babies to share... or a lovely large fill on a slope, or anywhere you could use erosion control (for instance). It's a wonderful shrub. Not sure of the second one...?

I've had plants grown in a greenhouse outdoors in a sheltered spot all week hardening off, and I'll be planting them this weekend. They are fully leafed out and cool is just fine for new plants. We will probably get a few light frosts still, but they should be fine since my perennials are all well sprouted. Only with non-hardy plants do I wait until the end of May, and I am an hour north and a zone and a half colder than you.