If it is Obedient plant (Physostegia), it will have square stems, and leaves and stem will be hairless. Flowers do not need to be arranged in rows, as one sees in many photos.
Cannot be foxglove (Digitalis), which has alternate leaf arrangement. Your pic shows opposite leaf arrangement.
Pay particular attention to the calyx - the green part just behind the colored flower. ...not right for Turtlehead (Chelone), but could be Physostegia or penstemon.
If you look inside a penstemon flower, you will see the stamens (the stems that hold the pollen) following the inside surface of the flower in a circular fashion. No other flower that looks like this has this characteristic.
