Bearing a strong resemblance to ginger flowers Calathea are not surprisingly of the same greater family of Zingiberidae.
These are classic forest floor plants that like indirect light and damp but not waterlogged soils.
They are excellent in warmer climates as under-tree plantings but in cooler climates best suited to indoor use in large pots or planters as the foliage will spray outwards to a metre or more.