Okay folks, I've about given up trying to ID these guys to an extent where I feel confident. I bought them from many years ago as S. Purpurea Purpurea and they have grown and spread and thrived. They are grown in full sun.
They all start out with deep purple veining just on the insdie of the pitcher tops which fade as the pitchers mature. Occasionally there is a faint blush along the leaf as it grows out. There are hairs on the inside of the pitchers but none on the outside. I've included three images to show how they look from the sides, the tops and the flowers.
Thank you for any insights.