Macbridea caroliniana. Carolina bird's-in-a-nest. A rare member of the Lamiaceae from the gulf coast that likes a rich, moist medium. Not sure about hardiness in the North. An easy plant to increase by vegetative means.
Lilium superbum 'N3 Georgia Jaguar'
Lilium superbum selection from Georgia. A typical form of the species.
Phlox floridana, the Florida phlox flowers nearly year round under cool greenhouse conditions and is a stunning and vigorous plant. Unsure about hardiness in northern climates, but Mary Henry successfully grew this at her estate in eastern Pennsylvania decades ago.