This is the most unique of the tacsonias that I've grown, with its malformed center. This bloom occurred on a very short vine, which is unusual among my tacsonias, and I wonder whether it's confused or will continue to bloom at a small size.
Your flower is absolutely gorgeous. Perhaps you can let us know whether it continues to bloom on a small vine, or if this one was just a fluke? I don't think there's much information on this vine's cultivation out there, so anything you could share with us would be very interesting :-)