Elegant house plant (Leasgill LA7)

This rather elegant plant with its long wiry stems, and shapely drooping leaves is a Calathea, exactly which species I know not. What I have are 3 offsets produced when I re-potted the parent plant. They don’t yet have the tall stems, but they will. This plant is an indoor house plant which thrives on benign neglect. Needs daylight, but NOT direct sun light. Avoid over-watering. I wait for the leaves to start rolling up, or until the compost is really dry, then stand it in a deep bowl of water for 20 minutes or so.