|Courtesy of Wikipedia|
The confusion between the two species comes from the fact that the obviously bulbous T. pseudobaileyi was sold as true T. baileyi for many years. How they got so tangled up in each other is beyond me, but as you can see from the above picture, tangling is what Tillies do best. Or perhaps someone dropped a label and stuck it on the wrong plant. Who knows what was going on with those botanists, hoofing around in the wilderness back in 1900?? At any rate, it's very easy to tell the difference between the two, and they are both beautiful and worth growing.